402255231 has 32 divisors (see below), whose sum is σ = 631454208. Its totient is φ = 222963840.

The previous prime is 402255221. The next prime is 402255263. The reversal of 402255231 is 132552204.

It is not a de Polignac number, because 402255231 - 2¹³ = 402247039 is a prime.

It is a super-2 number, since 2×402255231² = 323618541733726722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402255221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357636 + ... + 358758.

It is an arithmetic number, because the mean of its divisors is an integer number (19732944).

Almost surely, 2^402255231 is an apocalyptic number.

402255231 is a deficient number, since it is larger than the sum of its proper divisors (229198977).

402255231 is a wasteful number, since it uses less digits than its factorization.

402255231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 402255231 is about 20056.3015284474. The cubic root of 402255231 is about 738.1884291293.

The spelling of 402255231 in words is "four hundred two million, two hundred fifty-five thousand, two hundred thirty-one".