5256540137 has 4 divisors (see below), whose sum is σ = 5260386816. Its totient is φ = 5252693460.

The previous prime is 5256540109. The next prime is 5256540181. The reversal of 5256540137 is 7310456525.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5256540137 - 2¹² = 5256536041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5256540137.

It is not an unprimeable number, because it can be changed into a prime (5256540187) 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, 1921289 + ... + 1924022.

It is an arithmetic number, because the mean of its divisors is an integer number (1315096704).

Almost surely, 2^5256540137 is an apocalyptic number.

It is an amenable number.

5256540137 is a deficient number, since it is larger than the sum of its proper divisors (3846679).

5256540137 is a wasteful number, since it uses less digits than its factorization.

5256540137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846678.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 5256540137 is about 72502.0009172161. Note that the first 3 decimals coincide. The cubic root of 5256540137 is about 1738.7347274245.

The spelling of 5256540137 in words is "five billion, two hundred fifty-six million, five hundred forty thousand, one hundred thirty-seven".