401520455251 has 16 divisors (see below), whose sum is σ = 404990150400. Its totient is φ = 398065796128.

The previous prime is 401520455213. The next prime is 401520455267. The reversal of 401520455251 is 152554025104.

It is a cyclic number.

It is not a de Polignac number, because 401520455251 - 2⁹ = 401520454739 is a prime.

It is a super-2 number, since 2×401520455251² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401520455951) 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, 107962770 + ... + 107966488.

It is an arithmetic number, because the mean of its divisors is an integer number (25311884400).

Almost surely, 2^401520455251 is an apocalyptic number.

401520455251 is a deficient number, since it is larger than the sum of its proper divisors (3469695149).

401520455251 is a wasteful number, since it uses less digits than its factorization.

401520455251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498.

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 401520455251 in words is "four hundred one billion, five hundred twenty million, four hundred fifty-five thousand, two hundred fifty-one".