151891731 has 12 divisors (see below), whose sum is σ = 221530608. Its totient is φ = 100277424.

The previous prime is 151891709. The next prime is 151891741. The reversal of 151891731 is 137198151.

151891731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 151891731 - 2¹⁰ = 151890707 is a prime.

It is a super-2 number, since 2×151891731² = 46142195892352722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (151891741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81000 + ... + 82853.

It is an arithmetic number, because the mean of its divisors is an integer number (18460884).

Almost surely, 2^151891731 is an apocalyptic number.

151891731 is a deficient number, since it is larger than the sum of its proper divisors (69638877).

151891731 is a wasteful number, since it uses less digits than its factorization.

151891731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163962 (or 163959 counting only the distinct ones).

The product of its digits is 7560, while the sum is 36.

The square root of 151891731 is about 12324.4363359952. The cubic root of 151891731 is about 533.5535868494.

The spelling of 151891731 in words is "one hundred fifty-one million, eight hundred ninety-one thousand, seven hundred thirty-one".