31420244031 has 32 divisors (see below), whose sum is σ = 47036989440. Its totient is φ = 18494181600.

The previous prime is 31420243997. The next prime is 31420244069. The reversal of 31420244031 is 13044202413.

It is not a de Polignac number, because 31420244031 - 2²⁵ = 31386689599 is a prime.

It is a super-2 number, since 2×31420244031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31420243992 and 31420244010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420244081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64386 + ... + 258816.

It is an arithmetic number, because the mean of its divisors is an integer number (1469905920).

Almost surely, 2^31420244031 is an apocalyptic number.

31420244031 is a deficient number, since it is larger than the sum of its proper divisors (15616745409).

31420244031 is a wasteful number, since it uses less digits than its factorization.

31420244031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194587.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31420244031 its reverse (13044202413), we get a palindrome (44464446444).

The spelling of 31420244031 in words is "thirty-one billion, four hundred twenty million, two hundred forty-four thousand, thirty-one".