402421343031 has 12 divisors (see below), whose sum is σ = 581355887320. Its totient is φ = 268243688880.

The previous prime is 402421342979. The next prime is 402421343039. The reversal of 402421343031 is 130343124204.

402421343031 is a `hidden beast` number, since 402 + 4 + 213 + 43 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 402421343031 - 2³¹ = 400273859383 is a prime.

It is a super-2 number, since 2×402421343031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402421342986 and 402421343004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402421343039) 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, 3031960 + ... + 3161901.

Almost surely, 2^402421343031 is an apocalyptic number.

402421343031 is a deficient number, since it is larger than the sum of its proper divisors (178934544289).

402421343031 is a wasteful number, since it uses less digits than its factorization.

402421343031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6201086 (or 6201083 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 402421343031 its reverse (130343124204), we get a palindrome (532764467235).

The spelling of 402421343031 in words is "four hundred two billion, four hundred twenty-one million, three hundred forty-three thousand, thirty-one".