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31424812500 = 22356198821
BaseRepresentation
bin11101010001000100…
…001001010111010100
310000010001022212200110
4131101010021113110
51003324223000000
622234130443020
72161510333104
oct352104112724
9100101285613
1031424812500
111236653a824
126110133470
132c6a620613
141741779204
15c3dc70850
hex7511095d4

31424812500 has 168 divisors, whose sum is σ = 96489389920. Its totient is φ = 7938000000.

The previous prime is 31424812493. The next prime is 31424812537. The reversal of 31424812500 is 521842413.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3558090 + ... + 3566910.

Almost surely, 231424812500 is an apocalyptic number.

31424812500 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31424812500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48244694960).

31424812500 is an abundant number, since it is smaller than the sum of its proper divisors (65064577420).

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

31424812500 is an equidigital number, since it uses as much as digits as its factorization.

31424812500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8877 (or 8850 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 31424812500 in words is "thirty-one billion, four hundred twenty-four million, eight hundred twelve thousand, five hundred".