315861490173 has 4 divisors (see below), whose sum is σ = 421148653568. Its totient is φ = 210574326780.

The previous prime is 315861490099. The next prime is 315861490181. The reversal of 315861490173 is 371094168513.

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 not a de Polignac number, because 315861490173 - 2²⁰ = 315860441597 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 (315861410173) 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, 52643581693 + ... + 52643581698.

It is an arithmetic number, because the mean of its divisors is an integer number (105287163392).

Almost surely, 2^315861490173 is an apocalyptic number.

It is an amenable number.

315861490173 is a deficient number, since it is larger than the sum of its proper divisors (105287163395).

315861490173 is a wasteful number, since it uses less digits than its factorization.

315861490173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105287163394.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 315861490173 in words is "three hundred fifteen billion, eight hundred sixty-one million, four hundred ninety thousand, one hundred seventy-three".