31325501693 has 2 divisors, whose sum is σ = 31325501694. Its totient is φ = 31325501692.

The previous prime is 31325501663. The next prime is 31325501719. The reversal of 31325501693 is 39610552313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16858944964 + 14466556729 = 129842^2 + 120277^2 .

It is a cyclic number.

It is not a de Polignac number, because 31325501693 - 2¹⁰ = 31325500669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31325501663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15662750846 + 15662750847.

It is an arithmetic number, because the mean of its divisors is an integer number (15662750847).

Almost surely, 2^31325501693 is an apocalyptic number.

It is an amenable number.

31325501693 is a deficient number, since it is larger than the sum of its proper divisors (1).

31325501693 is an equidigital number, since it uses as much as digits as its factorization.

31325501693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 38.

The spelling of 31325501693 in words is "thirty-one billion, three hundred twenty-five million, five hundred one thousand, six hundred ninety-three".