251421415464453 has 32 divisors (see below), whose sum is σ = 363443598336000. Its totient is φ = 153680230319616.

The previous prime is 251421415464449. The next prime is 251421415464589. The reversal of 251421415464453 is 354464514124152.

It is not a de Polignac number, because 251421415464453 - 2² = 251421415464449 is a prime.

It is a super-2 number, since 2×251421415464453² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251421415464396 and 251421415464405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251421415466453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453440001 + ... + 453994137.

It is an arithmetic number, because the mean of its divisors is an integer number (11357612448000).

Almost surely, 2^{251421415464453} is an apocalyptic number.

It is an amenable number.

251421415464453 is a deficient number, since it is larger than the sum of its proper divisors (112022182871547).

251421415464453 is a wasteful number, since it uses less digits than its factorization.

251421415464453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632381.

The product of its digits is 9216000, while the sum is 51.

The spelling of 251421415464453 in words is "two hundred fifty-one trillion, four hundred twenty-one billion, four hundred fifteen million, four hundred sixty-four thousand, four hundred fifty-three".