31885920001 has 8 divisors (see below), whose sum is σ = 36358605864. Its totient is φ = 27701794560.

The previous prime is 31885919999. The next prime is 31885920029. The reversal of 31885920001 is 10002958813.

It can be written as a sum of positive squares in 4 ways, for example, as 9632441025 + 22253478976 = 98145^2 + 149176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31885920001 - 2¹ = 31885919999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31885920041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72139870 + ... + 72140311.

It is an arithmetic number, because the mean of its divisors is an integer number (4544825733).

Almost surely, 2^31885920001 is an apocalyptic number.

It is an amenable number.

31885920001 is a deficient number, since it is larger than the sum of its proper divisors (4472685863).

31885920001 is a wasteful number, since it uses less digits than its factorization.

31885920001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144280211.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 31885920001 in words is "thirty-one billion, eight hundred eighty-five million, nine hundred twenty thousand, one".