315551456522261 has 4 divisors (see below), whose sum is σ = 319545778756800. Its totient is φ = 311557134287724.

The previous prime is 315551456522231. The next prime is 315551456522279. The reversal of 315551456522261 is 162225654155513.

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 315551456522261 - 2¹⁰ = 315551456521237 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 (315551456522201) 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, 1997161117151 + ... + 1997161117308.

It is an arithmetic number, because the mean of its divisors is an integer number (79886444689200).

Almost surely, 2^{315551456522261} is an apocalyptic number.

It is an amenable number.

315551456522261 is a deficient number, since it is larger than the sum of its proper divisors (3994322234539).

315551456522261 is an equidigital number, since it uses as much as digits as its factorization.

315551456522261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994322234538.

The product of its digits is 10800000, while the sum is 53.

The spelling of 315551456522261 in words is "three hundred fifteen trillion, five hundred fifty-one billion, four hundred fifty-six million, five hundred twenty-two thousand, two hundred sixty-one".