31020422431 has 8 divisors (see below), whose sum is σ = 32099791680. Its totient is φ = 29941699872.

The previous prime is 31020422413. The next prime is 31020422441. The reversal of 31020422431 is 13422402013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31020422431 - 2¹⁷ = 31020291359 is a prime.

It is a super-2 number, since 2×31020422431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020422401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63040 + ... + 256933.

It is an arithmetic number, because the mean of its divisors is an integer number (4012473960).

Almost surely, 2^31020422431 is an apocalyptic number.

31020422431 is a deficient number, since it is larger than the sum of its proper divisors (1079369249).

31020422431 is a wasteful number, since it uses less digits than its factorization.

31020422431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323345.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31020422431 its reverse (13422402013), we get a palindrome (44442824444).

The spelling of 31020422431 in words is "thirty-one billion, twenty million, four hundred twenty-two thousand, four hundred thirty-one".