31447875601 has 2 divisors, whose sum is σ = 31447875602. Its totient is φ = 31447875600.

The previous prime is 31447875539. The next prime is 31447875611. The reversal of 31447875601 is 10657874413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31406928400 + 40947201 = 177220^2 + 6399^2 .

It is a cyclic number.

It is not a de Polignac number, because 31447875601 - 2¹¹ = 31447873553 is a prime.

It is a super-2 number, since 2×31447875601² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31447875611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15723937800 + 15723937801.

It is an arithmetic number, because the mean of its divisors is an integer number (15723937801).

Almost surely, 2^31447875601 is an apocalyptic number.

It is an amenable number.

31447875601 is a deficient number, since it is larger than the sum of its proper divisors (1).

31447875601 is an equidigital number, since it uses as much as digits as its factorization.

31447875601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 31447875601 in words is "thirty-one billion, four hundred forty-seven million, eight hundred seventy-five thousand, six hundred one".