31404233113431 has 32 divisors (see below), whose sum is σ = 42611059169280. Its totient is φ = 20570302130784.

The previous prime is 31404233113411. The next prime is 31404233113471. The reversal of 31404233113431 is 13431133240413.

It is not a de Polignac number, because 31404233113431 - 2⁶ = 31404233113367 is a prime.

It is a super-2 number, since 2×31404233113431² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31404233113392 and 31404233113401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404233113411) 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, 43502476 + ... + 44218478.

It is an arithmetic number, because the mean of its divisors is an integer number (1331595599040).

Almost surely, 2^{31404233113431} is an apocalyptic number.

31404233113431 is a deficient number, since it is larger than the sum of its proper divisors (11206826055849).

31404233113431 is a wasteful number, since it uses less digits than its factorization.

31404233113431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717235.

The product of its (nonzero) digits is 31104, while the sum is 33.

Adding to 31404233113431 its reverse (13431133240413), we get a palindrome (44835366353844).

The spelling of 31404233113431 in words is "thirty-one trillion, four hundred four billion, two hundred thirty-three million, one hundred thirteen thousand, four hundred thirty-one".