251020121432453 has 8 divisors (see below), whose sum is σ = 256361305580928. Its totient is φ = 245678951054944.

The previous prime is 251020121432321. The next prime is 251020121432537. The reversal of 251020121432453 is 354234121020152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251020121432453 is a prime.

It is a super-2 number, since 2×251020121432453² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251020121432953) 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, 38878025 + ... + 44872497.

It is an arithmetic number, because the mean of its divisors is an integer number (32045163197616).

Almost surely, 2^{251020121432453} is an apocalyptic number.

It is an amenable number.

251020121432453 is a deficient number, since it is larger than the sum of its proper divisors (5341184148475).

251020121432453 is an equidigital number, since it uses as much as digits as its factorization.

251020121432453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6885483.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 251020121432453 in words is "two hundred fifty-one trillion, twenty billion, one hundred twenty-one million, four hundred thirty-two thousand, four hundred fifty-three".