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145747531 is a prime number
BaseRepresentation
bin10001010111111…
…10111001001011
3101011020202000201
420223332321023
5244302410111
622243513031
73416555626
oct1053767113
9334222021
10145747531
11752a8306
1240988777
1324270457
14154dcdbd
15cbde6c1
hex8afee4b

145747531 has 2 divisors, whose sum is σ = 145747532. Its totient is φ = 145747530.

The previous prime is 145747529. The next prime is 145747543. The reversal of 145747531 is 135747541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145747531 - 21 = 145747529 is a prime.

It is a super-2 number, since 2×1457475312 = 42484685585191922, which contains 22 as substring.

Together with 145747529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145747501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72873765 + 72873766.

It is an arithmetic number, because the mean of its divisors is an integer number (72873766).

Almost surely, 2145747531 is an apocalyptic number.

145747531 is a deficient number, since it is larger than the sum of its proper divisors (1).

145747531 is an equidigital number, since it uses as much as digits as its factorization.

145747531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 37.

The square root of 145747531 is about 12072.5942116846. The cubic root of 145747531 is about 526.2600493828.

The spelling of 145747531 in words is "one hundred forty-five million, seven hundred forty-seven thousand, five hundred thirty-one".