2251555121 has 8 divisors (see below), whose sum is σ = 2325058560. Its totient is φ = 2179012752.

The previous prime is 2251555093. The next prime is 2251555127. The reversal of 2251555121 is 1215551522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251555121 - 2³⁰ = 1177813297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2251555127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235505 + ... + 244878.

It is an arithmetic number, because the mean of its divisors is an integer number (290632320).

Almost surely, 2^2251555121 is an apocalyptic number.

It is an amenable number.

2251555121 is a deficient number, since it is larger than the sum of its proper divisors (73503439).

2251555121 is a wasteful number, since it uses less digits than its factorization.

2251555121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480535.

The product of its digits is 5000, while the sum is 29.

The square root of 2251555121 is about 47450.5544856959. The cubic root of 2251555121 is about 1310.6725216507.

The spelling of 2251555121 in words is "two billion, two hundred fifty-one million, five hundred fifty-five thousand, one hundred twenty-one".