151551431 has 6 divisors (see below), whose sum is σ = 153661320. Its totient is φ = 149470128.

The previous prime is 151551427. The next prime is 151551451. The reversal of 151551431 is 134155151.

151551431 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 151551431 - 2² = 151551427 is a prime.

It is a super-2 number, since 2×151551431² = 45935672476295522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151551431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151551401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8891 + ... + 19548.

It is an arithmetic number, because the mean of its divisors is an integer number (25610220).

Almost surely, 2^151551431 is an apocalyptic number.

151551431 is a deficient number, since it is larger than the sum of its proper divisors (2109889).

151551431 is an frugal number, since it uses more digits than its factorization.

151551431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28585 (or 28512 counting only the distinct ones).

The product of its digits is 1500, while the sum is 26.

The square root of 151551431 is about 12310.6226893687. The cubic root of 151551431 is about 533.1548290207.

The spelling of 151551431 in words is "one hundred fifty-one million, five hundred fifty-one thousand, four hundred thirty-one".