257613013 has 8 divisors (see below), whose sum is σ = 294520832. Its totient is φ = 220731696.

The previous prime is 257613011. The next prime is 257613017. The reversal of 257613013 is 310316752.

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

It is a cyclic number.

It is not a de Polignac number, because 257613013 - 2¹ = 257613011 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 (257613011) 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, 23131 + ... + 32407.

It is an arithmetic number, because the mean of its divisors is an integer number (36815104).

Almost surely, 2^257613013 is an apocalyptic number.

It is an amenable number.

257613013 is a deficient number, since it is larger than the sum of its proper divisors (36907819).

257613013 is an equidigital number, since it uses as much as digits as its factorization.

257613013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13251.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 257613013 is about 16050.3275044468. The cubic root of 257613013 is about 636.2912226216.

Adding to 257613013 its reverse (310316752), we get a palindrome (567929765).

The spelling of 257613013 in words is "two hundred fifty-seven million, six hundred thirteen thousand, thirteen".