31315459019 has 4 divisors (see below), whose sum is σ = 33724340496. Its totient is φ = 28906577544.

The previous prime is 31315458997. The next prime is 31315459051. The reversal of 31315459019 is 91095451313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31315459019 - 2¹² = 31315454923 is a prime.

It is a super-2 number, since 2×31315459019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31315452019) 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, 1204440719 + ... + 1204440744.

It is an arithmetic number, because the mean of its divisors is an integer number (8431085124).

Almost surely, 2^31315459019 is an apocalyptic number.

31315459019 is a deficient number, since it is larger than the sum of its proper divisors (2408881477).

31315459019 is a wasteful number, since it uses less digits than its factorization.

31315459019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408881476.

The product of its (nonzero) digits is 72900, while the sum is 41.

The spelling of 31315459019 in words is "thirty-one billion, three hundred fifteen million, four hundred fifty-nine thousand, nineteen".