31351555132131 has 8 divisors (see below), whose sum is σ = 45017617625680. Its totient is φ = 19293264696672.

The previous prime is 31351555132129. The next prime is 31351555132133. The reversal of 31351555132131 is 13123155515313.

It is an interprime number because it is at equal distance from previous prime (31351555132129) and next prime (31351555132133).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31351555132131 - 2¹ = 31351555132129 is a prime.

It is a super-2 number, since 2×31351555132131² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 803886029029 = 31351555132131 / (3 + 1 + 3 + 5 + 1 + 5 + 5 + 5 + 1 + 3 + 2 + 1 + 3 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31351555132131.

It is not an unprimeable number, because it can be changed into a prime (31351555132133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401943014476 + ... + 401943014553.

It is an arithmetic number, because the mean of its divisors is an integer number (5627202203210).

Almost surely, 2^{31351555132131} is an apocalyptic number.

31351555132131 is a deficient number, since it is larger than the sum of its proper divisors (13666062493549).

31351555132131 is a wasteful number, since it uses less digits than its factorization.

31351555132131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803886029045.

The product of its digits is 101250, while the sum is 39.

The spelling of 31351555132131 in words is "thirty-one trillion, three hundred fifty-one billion, five hundred fifty-five million, one hundred thirty-two thousand, one hundred thirty-one".