251013401513 has 16 divisors (see below), whose sum is σ = 289231278336. Its totient is φ = 213391609920.

The previous prime is 251013401459. The next prime is 251013401533. The reversal of 251013401513 is 315104310152.

It is a cyclic number.

It is not a de Polignac number, because 251013401513 - 2¹⁰ = 251013400489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251013401533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207020 + ... + 738162.

It is an arithmetic number, because the mean of its divisors is an integer number (18076954896).

Almost surely, 2^251013401513 is an apocalyptic number.

It is an amenable number.

251013401513 is a deficient number, since it is larger than the sum of its proper divisors (38217876823).

251013401513 is a wasteful number, since it uses less digits than its factorization.

251013401513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531704.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 251013401513 its reverse (315104310152), we get a palindrome (566117711665).

The spelling of 251013401513 in words is "two hundred fifty-one billion, thirteen million, four hundred one thousand, five hundred thirteen".