31404600551 has 2 divisors, whose sum is σ = 31404600552. Its totient is φ = 31404600550.

The previous prime is 31404600529. The next prime is 31404600611. The reversal of 31404600551 is 15500640413.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15500640413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31404600551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31404600151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15702300275 + 15702300276.

It is an arithmetic number, because the mean of its divisors is an integer number (15702300276).

Almost surely, 2^31404600551 is an apocalyptic number.

31404600551 is a deficient number, since it is larger than the sum of its proper divisors (1).

31404600551 is an equidigital number, since it uses as much as digits as its factorization.

31404600551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 31404600551 in words is "thirty-one billion, four hundred four million, six hundred thousand, five hundred fifty-one".