2551065157 has 4 divisors (see below), whose sum is σ = 2551680076. Its totient is φ = 2550450240.

The previous prime is 2551065137. The next prime is 2551065161. The reversal of 2551065157 is 7515601552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1954435681 + 596629476 = 44209^2 + 24426^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551065157 - 2³¹ = 403581509 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 (2551065137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301194 + ... + 309547.

It is an arithmetic number, because the mean of its divisors is an integer number (637920019).

Almost surely, 2^2551065157 is an apocalyptic number.

It is an amenable number.

2551065157 is a deficient number, since it is larger than the sum of its proper divisors (614919).

2551065157 is an equidigital number, since it uses as much as digits as its factorization.

2551065157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614918.

The product of its (nonzero) digits is 52500, while the sum is 37.

The square root of 2551065157 is about 50508.0702165505. The cubic root of 2551065157 is about 1366.3874056875.

The spelling of 2551065157 in words is "two billion, five hundred fifty-one million, sixty-five thousand, one hundred fifty-seven".