402545331 has 24 divisors (see below), whose sum is σ = 587559024. Its totient is φ = 265561920.

The previous prime is 402545291. The next prime is 402545347. The reversal of 402545331 is 133545204.

It is not a de Polignac number, because 402545331 - 2⁷ = 402545203 is a prime.

It is a super-2 number, since 2×402545331² = 324085487019799122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402545295 and 402545304.

It is not an unprimeable number, because it can be changed into a prime (402585331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489901 + ... + 490721.

It is an arithmetic number, because the mean of its divisors is an integer number (24481626).

Almost surely, 2^402545331 is an apocalyptic number.

402545331 is a deficient number, since it is larger than the sum of its proper divisors (185013693).

402545331 is a wasteful number, since it uses less digits than its factorization.

402545331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 402545331 is about 20063.5323659619. The cubic root of 402545331 is about 738.3658430258.

The spelling of 402545331 in words is "four hundred two million, five hundred forty-five thousand, three hundred thirty-one".