2631231221355 has 192 divisors, whose sum is σ = 5152935191040. Its totient is φ = 1231111526400.

The previous prime is 2631231221341. The next prime is 2631231221471. The reversal of 2631231221355 is 5531221321362.

2631231221355 is a `hidden beast` number, since 2 + 6 + 312 + 312 + 21 + 3 + 5 + 5 = 666.

It is not a de Polignac number, because 2631231221355 - 2¹⁴ = 2631231204971 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1145506567 + ... + 1145508863.

It is an arithmetic number, because the mean of its divisors is an integer number (26838204120).

Almost surely, 2^{2631231221355} is an apocalyptic number.

2631231221355 is a deficient number, since it is larger than the sum of its proper divisors (2521703969685).

2631231221355 is a wasteful number, since it uses less digits than its factorization.

2631231221355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082 (or 3079 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The spelling of 2631231221355 in words is "two trillion, six hundred thirty-one billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred fifty-five".