2251664157 has 8 divisors (see below), whose sum is σ = 3002882176. Its totient is φ = 1500777792.

The previous prime is 2251664131. The next prime is 2251664209. The reversal of 2251664157 is 7514661522.

2251664157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2251664157 - 2⁸ = 2251663901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251660157) 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, 66613 + ... + 94554.

It is an arithmetic number, because the mean of its divisors is an integer number (375360272).

Almost surely, 2^2251664157 is an apocalyptic number.

It is an amenable number.

2251664157 is a deficient number, since it is larger than the sum of its proper divisors (751218019).

2251664157 is a wasteful number, since it uses less digits than its factorization.

2251664157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165827.

The product of its digits is 100800, while the sum is 39.

The square root of 2251664157 is about 47451.7034151568. The cubic root of 2251664157 is about 1310.6936786103.

The spelling of 2251664157 in words is "two billion, two hundred fifty-one million, six hundred sixty-four thousand, one hundred fifty-seven".