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145731471700 = 22521798141423
BaseRepresentation
bin1000011110111001000…
…1011100100101010100
3111221011021110210211211
42013232101130211110
54341424224043300
6150540443111204
713346235033223
oct2075621344524
9457137423754
10145731471700
1156893686711
12242b1212504
131098612ba79
1470a68dacba
153bcdeb54ba
hex21ee45c954

145731471700 has 36 divisors (see below), whose sum is σ = 318004021440. Its totient is φ = 57966924640.

The previous prime is 145731471661. The next prime is 145731471703. The reversal of 145731471700 is 7174137541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145731471703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4052812 + ... + 4088611.

It is an arithmetic number, because the mean of its divisors is an integer number (8833445040).

Almost surely, 2145731471700 is an apocalyptic number.

145731471700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145731471700 is an abundant number, since it is smaller than the sum of its proper divisors (172272549740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145731471700 is a wasteful number, since it uses less digits than its factorization.

145731471700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8141616 (or 8141609 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 145731471700 in words is "one hundred forty-five billion, seven hundred thirty-one million, four hundred seventy-one thousand, seven hundred".

Divisors: 1 2 4 5 10 20 25 50 100 179 358 716 895 1790 3580 4475 8950 17900 8141423 16282846 32565692 40707115 81414230 162828460 203535575 407071150 814142300 1457314717 2914629434 5829258868 7286573585 14573147170 29146294340 36432867925 72865735850 145731471700