31611655001 has 4 divisors (see below), whose sum is σ = 32701712100. Its totient is φ = 30521597904.

The previous prime is 31611654901. The next prime is 31611655007. The reversal of 31611655001 is 10055611613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6835320976 + 24776334025 = 82676^2 + 157405^2 .

It is a cyclic number.

It is not a de Polignac number, because 31611655001 - 2³⁴ = 14431785817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1090057069 = 31611655001 / (3 + 1 + 6 + 1 + 1 + 6 + 5 + 5 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31611655007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545028506 + ... + 545028563.

It is an arithmetic number, because the mean of its divisors is an integer number (8175428025).

Almost surely, 2^31611655001 is an apocalyptic number.

It is an amenable number.

31611655001 is a deficient number, since it is larger than the sum of its proper divisors (1090057099).

31611655001 is a wasteful number, since it uses less digits than its factorization.

31611655001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090057098.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 31611655001 in words is "thirty-one billion, six hundred eleven million, six hundred fifty-five thousand, one".