31318211453 has 4 divisors (see below), whose sum is σ = 31475589600. Its totient is φ = 31160833308.

The previous prime is 31318211447. The next prime is 31318211459. The reversal of 31318211453 is 35411281313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35411281313 = 331 ⋅106982723.

It is an interprime number because it is at equal distance from previous prime (31318211447) and next prime (31318211459).

It is a cyclic number.

It is not a de Polignac number, because 31318211453 - 2⁶ = 31318211389 is a prime.

It is a super-2 number, since 2×31318211453² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31318211459) 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, 78688775 + ... + 78689172.

It is an arithmetic number, because the mean of its divisors is an integer number (7868897400).

Almost surely, 2^31318211453 is an apocalyptic number.

It is an amenable number.

31318211453 is a deficient number, since it is larger than the sum of its proper divisors (157378147).

31318211453 is a wasteful number, since it uses less digits than its factorization.

31318211453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157378146.

The product of its digits is 8640, while the sum is 32.

Adding to 31318211453 its reverse (35411281313), we get a palindrome (66729492766).

The spelling of 31318211453 in words is "thirty-one billion, three hundred eighteen million, two hundred eleven thousand, four hundred fifty-three".