31401124313 has 4 divisors (see below), whose sum is σ = 33816595428. Its totient is φ = 28985653200.

The previous prime is 31401124301. The next prime is 31401124333. The reversal of 31401124313 is 31342110413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31342110413 = 53849 ⋅582037.

It can be written as a sum of positive squares in 2 ways, for example, as 11595628489 + 19805495824 = 107683^2 + 140732^2 .

It is a cyclic number.

It is not a de Polignac number, because 31401124313 - 2¹² = 31401120217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31401124333) 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, 1207735538 + ... + 1207735563.

It is an arithmetic number, because the mean of its divisors is an integer number (8454148857).

Almost surely, 2^31401124313 is an apocalyptic number.

It is an amenable number.

31401124313 is a deficient number, since it is larger than the sum of its proper divisors (2415471115).

31401124313 is a wasteful number, since it uses less digits than its factorization.

31401124313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415471114.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31401124313 its reverse (31342110413), we get a palindrome (62743234726).

The spelling of 31401124313 in words is "thirty-one billion, four hundred one million, one hundred twenty-four thousand, three hundred thirteen".