2501221155 has 16 divisors (see below), whose sum is σ = 4008433920. Its totient is φ = 1331824608.

The previous prime is 2501221141. The next prime is 2501221159. The reversal of 2501221155 is 5511221052.

It is not a de Polignac number, because 2501221155 - 2⁴ = 2501221139 is a prime.

It is a super-2 number, since 2×2501221155² = 12512214532439068050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2501221159) 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, 125407 + ... + 143976.

It is an arithmetic number, because the mean of its divisors is an integer number (250527120).

Almost surely, 2^2501221155 is an apocalyptic number.

2501221155 is a deficient number, since it is larger than the sum of its proper divisors (1507212765).

2501221155 is a wasteful number, since it uses less digits than its factorization.

2501221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270010.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2501221155 is about 50012.2100591446. The cubic root of 2501221155 is about 1357.4297539698.

The spelling of 2501221155 in words is "two billion, five hundred one million, two hundred twenty-one thousand, one hundred fifty-five".