31428423553 has 4 divisors (see below), whose sum is σ = 32159317168. Its totient is φ = 30697529940.

The previous prime is 31428423539. The next prime is 31428423557. The reversal of 31428423553 is 35532482413.

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 31428423553 - 2⁹ = 31428423041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31428423557) 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, 365446743 + ... + 365446828.

It is an arithmetic number, because the mean of its divisors is an integer number (8039829292).

Almost surely, 2^31428423553 is an apocalyptic number.

It is an amenable number.

31428423553 is a deficient number, since it is larger than the sum of its proper divisors (730893615).

31428423553 is an equidigital number, since it uses as much as digits as its factorization.

31428423553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730893614.

The product of its digits is 345600, while the sum is 40.

The spelling of 31428423553 in words is "thirty-one billion, four hundred twenty-eight million, four hundred twenty-three thousand, five hundred fifty-three".