251213530344451 has 16 divisors (see below), whose sum is σ = 265470865712640. Its totient is φ = 237331729706400.

The previous prime is 251213530344421. The next prime is 251213530344473. The reversal of 251213530344451 is 154443035312152.

It is a cyclic number.

It is not a de Polignac number, because 251213530344451 - 2⁷ = 251213530344323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251213530344398 and 251213530344407.

It is not an unprimeable number, because it can be changed into a prime (251213530344421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17227101 + ... + 28270126.

It is an arithmetic number, because the mean of its divisors is an integer number (16591929107040).

Almost surely, 2^{251213530344451} is an apocalyptic number.

251213530344451 is a deficient number, since it is larger than the sum of its proper divisors (14257335368189).

251213530344451 is a wasteful number, since it uses less digits than its factorization.

251213530344451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45501354.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 251213530344451 in words is "two hundred fifty-one trillion, two hundred thirteen billion, five hundred thirty million, three hundred forty-four thousand, four hundred fifty-one".