151195531 has 4 divisors (see below), whose sum is σ = 156409200. Its totient is φ = 145981864.

The previous prime is 151195511. The next prime is 151195543. The reversal of 151195531 is 135591151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135591151 = 3313 ⋅40927.

It is a cyclic number.

It is not a de Polignac number, because 151195531 - 2²¹ = 149098379 is a prime.

It is a super-2 number, since 2×151195531² = 45720177188743922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151195493 and 151195502.

It is not an unprimeable number, because it can be changed into a prime (151195511) 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, 2606791 + ... + 2606848.

It is an arithmetic number, because the mean of its divisors is an integer number (39102300).

Almost surely, 2^151195531 is an apocalyptic number.

151195531 is a deficient number, since it is larger than the sum of its proper divisors (5213669).

151195531 is an equidigital number, since it uses as much as digits as its factorization.

151195531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213668.

The product of its digits is 3375, while the sum is 31.

The square root of 151195531 is about 12296.1591970826. The cubic root of 151195531 is about 532.7371522597.

The spelling of 151195531 in words is "one hundred fifty-one million, one hundred ninety-five thousand, five hundred thirty-one".