31197522050 has 18 divisors (see below), whose sum is σ = 58029714153. Its totient is φ = 12478509240.

The previous prime is 31197521983. The next prime is 31197522053. The reversal of 31197522050 is 5022579113.

It can be written as a sum of positive squares in 2 ways, for example, as 30573571609 + 623950441 = 174853^2 + 24979^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=124895.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31197522050.

It is not an unprimeable number, because it can be changed into a prime (31197522053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1236461 + ... + 1261439.

Almost surely, 2^31197522050 is an apocalyptic number.

31197522050 is a deficient number, since it is larger than the sum of its proper divisors (26832192103).

31197522050 is an frugal number, since it uses more digits than its factorization.

31197522050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49970 (or 24986 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 31197522050 in words is "thirty-one billion, one hundred ninety-seven million, five hundred twenty-two thousand, fifty".