151585531 has 2 divisors, whose sum is σ = 151585532. Its totient is φ = 151585530.

The previous prime is 151585517. The next prime is 151585607. The reversal of 151585531 is 135585151.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151585531 - 2⁷ = 151585403 is a prime.

It is a super-2 number, since 2×151585531² = 45956346417103922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (151585501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75792765 + 75792766.

It is an arithmetic number, because the mean of its divisors is an integer number (75792766).

Almost surely, 2^151585531 is an apocalyptic number.

151585531 is a deficient number, since it is larger than the sum of its proper divisors (1).

151585531 is an equidigital number, since it uses as much as digits as its factorization.

151585531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15000, while the sum is 34.

The square root of 151585531 is about 12312.0075942147. The cubic root of 151585531 is about 533.1948137224.

The spelling of 151585531 in words is "one hundred fifty-one million, five hundred eighty-five thousand, five hundred thirty-one".