151536531 has 4 divisors (see below), whose sum is σ = 202048712. Its totient is φ = 101024352.

The previous prime is 151536529. The next prime is 151536551. The reversal of 151536531 is 135635151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135635151 = 3 ⋅45211717.

It is not a de Polignac number, because 151536531 - 2¹ = 151536529 is a prime.

It is a super-2 number, since 2×151536531² = 45926640455027922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151536551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25256086 + ... + 25256091.

It is an arithmetic number, because the mean of its divisors is an integer number (50512178).

Almost surely, 2^151536531 is an apocalyptic number.

151536531 is a deficient number, since it is larger than the sum of its proper divisors (50512181).

151536531 is an equidigital number, since it uses as much as digits as its factorization.

151536531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50512180.

The product of its digits is 6750, while the sum is 30.

The square root of 151536531 is about 12310.0175060802. The cubic root of 151536531 is about 533.1373558165.

The spelling of 151536531 in words is "one hundred fifty-one million, five hundred thirty-six thousand, five hundred thirty-one".