31405452101 has 2 divisors, whose sum is σ = 31405452102. Its totient is φ = 31405452100.

The previous prime is 31405452079. The next prime is 31405452109. The reversal of 31405452101 is 10125450413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17364387076 + 14041065025 = 131774^2 + 118495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31405452101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31405452109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15702726050 + 15702726051.

It is an arithmetic number, because the mean of its divisors is an integer number (15702726051).

Almost surely, 2^31405452101 is an apocalyptic number.

It is an amenable number.

31405452101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31405452101 is an equidigital number, since it uses as much as digits as its factorization.

31405452101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 31405452101 in words is "thirty-one billion, four hundred five million, four hundred fifty-two thousand, one hundred one".