2256138157 has 8 divisors (see below), whose sum is σ = 2776785536. Its totient is φ = 1785076272.

The previous prime is 2256138151. The next prime is 2256138167. The reversal of 2256138157 is 7518316522.

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

It is not a de Polignac number, because 2256138157 - 2²⁷ = 2121920429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256138151) 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, 12396273 + ... + 12396454.

It is an arithmetic number, because the mean of its divisors is an integer number (347098192).

Almost surely, 2^2256138157 is an apocalyptic number.

It is an amenable number.

2256138157 is a deficient number, since it is larger than the sum of its proper divisors (520647379).

2256138157 is a wasteful number, since it uses less digits than its factorization.

2256138157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24792747.

The product of its digits is 100800, while the sum is 40.

The square root of 2256138157 is about 47498.8226906731. The cubic root of 2256138157 is about 1311.5612093918.

The spelling of 2256138157 in words is "two billion, two hundred fifty-six million, one hundred thirty-eight thousand, one hundred fifty-seven".