31320601573 has 2 divisors, whose sum is σ = 31320601574. Its totient is φ = 31320601572.

The previous prime is 31320601561. The next prime is 31320601583. The reversal of 31320601573 is 37510602313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31292902404 + 27699169 = 176898^2 + 5263^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320601573 - 2²⁹ = 30783730661 is a prime.

It is a super-2 number, since 2×31320601573² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320601513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660300786 + 15660300787.

It is an arithmetic number, because the mean of its divisors is an integer number (15660300787).

Almost surely, 2^31320601573 is an apocalyptic number.

It is an amenable number.

31320601573 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320601573 is an equidigital number, since it uses as much as digits as its factorization.

31320601573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The spelling of 31320601573 in words is "thirty-one billion, three hundred twenty million, six hundred one thousand, five hundred seventy-three".