402435231 has 24 divisors (see below), whose sum is σ = 590954112. Its totient is φ = 243421200.

The previous prime is 402435227. The next prime is 402435259. The reversal of 402435231 is 132534204.

It is not a de Polignac number, because 402435231 - 2² = 402435227 is a prime.

It is a super-2 number, since 2×402435231² = 323908230300046722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402435331) 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, 293710 + ... + 295076.

It is an arithmetic number, because the mean of its divisors is an integer number (24623088).

Almost surely, 2^402435231 is an apocalyptic number.

402435231 is a deficient number, since it is larger than the sum of its proper divisors (188518881).

402435231 is a wasteful number, since it uses less digits than its factorization.

402435231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 402435231 is about 20060.7883942780. The cubic root of 402435231 is about 738.2985201798.

Adding to 402435231 its reverse (132534204), we get a palindrome (534969435).

The spelling of 402435231 in words is "four hundred two million, four hundred thirty-five thousand, two hundred thirty-one".