31403220427 has 8 divisors (see below), whose sum is σ = 31434642512. Its totient is φ = 31371818400.

The previous prime is 31403220391. The next prime is 31403220521. The reversal of 31403220427 is 72402230413.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31403220427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31403220395 and 31403220404.

It is not an unprimeable number, because it can be changed into a prime (31403220127) 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, 6264352 + ... + 6269362.

It is an arithmetic number, because the mean of its divisors is an integer number (3929330314).

Almost surely, 2^31403220427 is an apocalyptic number.

31403220427 is a deficient number, since it is larger than the sum of its proper divisors (31422085).

31403220427 is a wasteful number, since it uses less digits than its factorization.

31403220427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029.

The product of its (nonzero) digits is 8064, while the sum is 28.

The spelling of 31403220427 in words is "thirty-one billion, four hundred three million, two hundred twenty thousand, four hundred twenty-seven".