2155615403251 has 16 divisors (see below), whose sum is σ = 2263791955968. Its totient is φ = 2048684853600.

The previous prime is 2155615403189. The next prime is 2155615403257. The reversal of 2155615403251 is 1523045165512.

It is a cyclic number.

It is not a de Polignac number, because 2155615403251 - 2⁹ = 2155615402739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155615403257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1816341 + ... + 2758681.

It is an arithmetic number, because the mean of its divisors is an integer number (141486997248).

Almost surely, 2^{2155615403251} is an apocalyptic number.

2155615403251 is a deficient number, since it is larger than the sum of its proper divisors (108176552717).

2155615403251 is a wasteful number, since it uses less digits than its factorization.

2155615403251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943002.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 2155615403251 in words is "two trillion, one hundred fifty-five billion, six hundred fifteen million, four hundred three thousand, two hundred fifty-one".