31432020091 has 2 divisors, whose sum is σ = 31432020092. Its totient is φ = 31432020090.

The previous prime is 31432020083. The next prime is 31432020107. The reversal of 31432020091 is 19002023413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31432020091 - 2³ = 31432020083 is a prime.

It is not a weakly prime, because it can be changed into another prime (31432020031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15716010045 + 15716010046.

It is an arithmetic number, because the mean of its divisors is an integer number (15716010046).

Almost surely, 2^31432020091 is an apocalyptic number.

31432020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

31432020091 is an equidigital number, since it uses as much as digits as its factorization.

31432020091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 31432020091 in words is "thirty-one billion, four hundred thirty-two million, twenty thousand, ninety-one".