31543964131 has 4 divisors (see below), whose sum is σ = 32215112352. Its totient is φ = 30872815912.

The previous prime is 31543964119. The next prime is 31543964159. The reversal of 31543964131 is 13146934513.

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

It is a cyclic number.

It is not a de Polignac number, because 31543964131 - 2¹¹ = 31543962083 is a prime.

It is a super-2 number, since 2×31543964131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31543964191) 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, 335574040 + ... + 335574133.

It is an arithmetic number, because the mean of its divisors is an integer number (8053778088).

Almost surely, 2^31543964131 is an apocalyptic number.

31543964131 is a deficient number, since it is larger than the sum of its proper divisors (671148221).

31543964131 is an equidigital number, since it uses as much as digits as its factorization.

31543964131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671148220.

The product of its digits is 116640, while the sum is 40.

The spelling of 31543964131 in words is "thirty-one billion, five hundred forty-three million, nine hundred sixty-four thousand, one hundred thirty-one".