2021551631015 has 12 divisors (see below), whose sum is σ = 2821921052616. Its totient is φ = 1386206832528.

The previous prime is 2021551630951. The next prime is 2021551631027. The reversal of 2021551631015 is 5101361551202.

It is not a de Polignac number, because 2021551631015 - 2⁶ = 2021551630951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4125615329 + ... + 4125615818.

It is an arithmetic number, because the mean of its divisors is an integer number (235160087718).

Almost surely, 2^{2021551631015} is an apocalyptic number.

2021551631015 is a deficient number, since it is larger than the sum of its proper divisors (800369421601).

2021551631015 is an equidigital number, since it uses as much as digits as its factorization.

2021551631015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251231166 (or 8251231159 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 2021551631015 in words is "two trillion, twenty-one billion, five hundred fifty-one million, six hundred thirty-one thousand, fifteen".