31551143130 has 48 divisors (see below), whose sum is σ = 88343204040. Its totient is φ = 7766434944.

The previous prime is 31551143123. The next prime is 31551143147. The reversal of 31551143130 is 3134115513.

It is a happy number.

31551143130 is a `hidden beast` number, since 3 + 15 + 511 + 4 + 3 + 130 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14118430041 + 17432713089 = 118821^2 + 132033^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31551143094 and 31551143103.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13482225 + ... + 13484564.

Almost surely, 2^31551143130 is an apocalyptic number.

31551143130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31551143130 is an abundant number, since it is smaller than the sum of its proper divisors (56792060910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31551143130 is a wasteful number, since it uses less digits than its factorization.

31551143130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26966815 (or 26966812 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 31551143130 its reverse (3134115513), we get a palindrome (34685258643).

The spelling of 31551143130 in words is "thirty-one billion, five hundred fifty-one million, one hundred forty-three thousand, one hundred thirty".