256162013 has 4 divisors (see below), whose sum is σ = 256217280. Its totient is φ = 256106748.

The previous prime is 256162007. The next prime is 256162019. The reversal of 256162013 is 310261652.

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 an interprime number because it is at equal distance from previous prime (256162007) and next prime (256162019).

It is a cyclic number.

It is not a de Polignac number, because 256162013 - 2⁶ = 256161949 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 (256162019) 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, 19973 + ... + 30186.

It is an arithmetic number, because the mean of its divisors is an integer number (64054320).

Almost surely, 2^256162013 is an apocalyptic number.

It is an amenable number.

256162013 is a deficient number, since it is larger than the sum of its proper divisors (55267).

256162013 is an equidigital number, since it uses as much as digits as its factorization.

256162013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55266.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 256162013 is about 16005.0621054715. The cubic root of 256162013 is about 635.0943402521.

The spelling of 256162013 in words is "two hundred fifty-six million, one hundred sixty-two thousand, thirteen".