31045476421 has 4 divisors (see below), whose sum is σ = 31046277312. Its totient is φ = 31044675532.

The previous prime is 31045476403. The next prime is 31045476431. The reversal of 31045476421 is 12467454013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31045476421 - 2¹¹ = 31045474373 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 (31045476431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339175 + ... + 420868.

It is an arithmetic number, because the mean of its divisors is an integer number (7761569328).

Almost surely, 2^31045476421 is an apocalyptic number.

It is an amenable number.

31045476421 is a deficient number, since it is larger than the sum of its proper divisors (800891).

31045476421 is an equidigital number, since it uses as much as digits as its factorization.

31045476421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800890.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 31045476421 in words is "thirty-one billion, forty-five million, four hundred seventy-six thousand, four hundred twenty-one".