31421704553 has 2 divisors, whose sum is σ = 31421704554. Its totient is φ = 31421704552.

The previous prime is 31421704547. The next prime is 31421704649. The reversal of 31421704553 is 35540712413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19297932889 + 12123771664 = 138917^2 + 110108^2 .

It is a cyclic number.

It is not a de Polignac number, because 31421704553 - 2⁸ = 31421704297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31421604553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710852276 + 15710852277.

It is an arithmetic number, because the mean of its divisors is an integer number (15710852277).

Almost surely, 2^31421704553 is an apocalyptic number.

It is an amenable number.

31421704553 is a deficient number, since it is larger than the sum of its proper divisors (1).

31421704553 is an equidigital number, since it uses as much as digits as its factorization.

31421704553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 31421704553 in words is "thirty-one billion, four hundred twenty-one million, seven hundred four thousand, five hundred fifty-three".