31400413123 has 4 divisors (see below), whose sum is σ = 31402814680. Its totient is φ = 31398011568.

The previous prime is 31400413043. The next prime is 31400413141. The reversal of 31400413123 is 32131400413.

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-31400413123 is a prime.

It is a super-2 number, since 2×31400413123² (a number of 22 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 = 31400413094 and 31400413103.

It is not an unprimeable number, because it can be changed into a prime (31400413153) 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, 1181058 + ... + 1207351.

It is an arithmetic number, because the mean of its divisors is an integer number (7850703670).

Almost surely, 2^31400413123 is an apocalyptic number.

31400413123 is a deficient number, since it is larger than the sum of its proper divisors (2401557).

31400413123 is a wasteful number, since it uses less digits than its factorization.

31400413123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401556.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31400413123 its reverse (32131400413), we get a palindrome (63531813536).

The spelling of 31400413123 in words is "thirty-one billion, four hundred million, four hundred thirteen thousand, one hundred twenty-three".