31404202210231 has 4 divisors (see below), whose sum is σ = 32769602306352. Its totient is φ = 30038802114112.

The previous prime is 31404202210159. The next prime is 31404202210267. The reversal of 31404202210231 is 13201220240413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31404202210231 is a prime.

It is a super-2 number, since 2×31404202210231² (a number of 28 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 = 31404202210196 and 31404202210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404202210291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682700048026 + ... + 682700048071.

It is an arithmetic number, because the mean of its divisors is an integer number (8192400576588).

Almost surely, 2^{31404202210231} is an apocalyptic number.

31404202210231 is a deficient number, since it is larger than the sum of its proper divisors (1365400096121).

31404202210231 is a wasteful number, since it uses less digits than its factorization.

31404202210231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365400096120.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31404202210231 its reverse (13201220240413), we get a palindrome (44605422450644).

The spelling of 31404202210231 in words is "thirty-one trillion, four hundred four billion, two hundred two million, two hundred ten thousand, two hundred thirty-one".