251135201122413 has 16 divisors (see below), whose sum is σ = 349424152874496. Its totient is φ = 160135635711920.

The previous prime is 251135201122409. The next prime is 251135201122483. The reversal of 251135201122413 is 314221102531152.

It is a cyclic number.

It is not a de Polignac number, because 251135201122413 - 2² = 251135201122409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251135201122483) 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, 95863095 + ... + 98447972.

It is an arithmetic number, because the mean of its divisors is an integer number (21839009554656).

Almost surely, 2^{251135201122413} is an apocalyptic number.

251135201122413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

251135201122413 is a deficient number, since it is larger than the sum of its proper divisors (98288951752083).

251135201122413 is a wasteful number, since it uses less digits than its factorization.

251135201122413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194329824.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 251135201122413 its reverse (314221102531152), we get a palindrome (565356303653565).

The spelling of 251135201122413 in words is "two hundred fifty-one trillion, one hundred thirty-five billion, two hundred one million, one hundred twenty-two thousand, four hundred thirteen".