31551234551 has 2 divisors, whose sum is σ = 31551234552. Its totient is φ = 31551234550.

The previous prime is 31551234527. The next prime is 31551234569. The reversal of 31551234551 is 15543215513.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31551234551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31551234511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15775617275 + 15775617276.

It is an arithmetic number, because the mean of its divisors is an integer number (15775617276).

Almost surely, 2^31551234551 is an apocalyptic number.

31551234551 is a deficient number, since it is larger than the sum of its proper divisors (1).

31551234551 is an equidigital number, since it uses as much as digits as its factorization.

31551234551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45000, while the sum is 35.

The spelling of 31551234551 in words is "thirty-one billion, five hundred fifty-one million, two hundred thirty-four thousand, five hundred fifty-one".