31773771421 has 8 divisors (see below), whose sum is σ = 38224086080. Its totient is φ = 25801257888.

The previous prime is 31773771401. The next prime is 31773771473. The reversal of 31773771421 is 12417737713.

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

It is not a de Polignac number, because 31773771421 - 2²¹ = 31771674269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31773771401) 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, 119450136 + ... + 119450401.

It is an arithmetic number, because the mean of its divisors is an integer number (4778010760).

Almost surely, 2^31773771421 is an apocalyptic number.

It is an amenable number.

31773771421 is a deficient number, since it is larger than the sum of its proper divisors (6450314659).

31773771421 is a wasteful number, since it uses less digits than its factorization.

31773771421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238900563.

The product of its digits is 172872, while the sum is 43.

The spelling of 31773771421 in words is "thirty-one billion, seven hundred seventy-three million, seven hundred seventy-one thousand, four hundred twenty-one".