31551143131 has 8 divisors (see below), whose sum is σ = 31683974400. Its totient is φ = 31418513640.

The previous prime is 31551143123. The next prime is 31551143147. The reversal of 31551143131 is 13134115513.

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

It is a cyclic number.

It is not a de Polignac number, because 31551143131 - 2³ = 31551143123 is a prime.

It is a super-2 number, since 2×31551143131² (a number of 22 digits) contains 22 as substring.

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 31551143131.

It is not an unprimeable number, because it can be changed into a prime (31551143191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267130 + ... + 366688.

It is an arithmetic number, because the mean of its divisors is an integer number (3960496800).

Almost surely, 2^31551143131 is an apocalyptic number.

31551143131 is a deficient number, since it is larger than the sum of its proper divisors (132831269).

31551143131 is a wasteful number, since it uses less digits than its factorization.

31551143131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100889.

The product of its digits is 2700, while the sum is 28.

Adding to 31551143131 its reverse (13134115513), we get a palindrome (44685258644).

The spelling of 31551143131 in words is "thirty-one billion, five hundred fifty-one million, one hundred forty-three thousand, one hundred thirty-one".