401508481 has 4 divisors (see below), whose sum is σ = 438009264. Its totient is φ = 365007700.

The previous prime is 401508473. The next prime is 401508487. The reversal of 401508481 is 184805104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401508481 - 2³ = 401508473 is a prime.

It is a super-2 number, since 2×401508481² = 322418120629854722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (401508487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18250375 + ... + 18250396.

It is an arithmetic number, because the mean of its divisors is an integer number (109502316).

Almost surely, 2^401508481 is an apocalyptic number.

It is an amenable number.

401508481 is a deficient number, since it is larger than the sum of its proper divisors (36500783).

401508481 is a wasteful number, since it uses less digits than its factorization.

401508481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36500782.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 401508481 is about 20037.6765369641. The cubic root of 401508481 is about 737.7313530994.

The spelling of 401508481 in words is "four hundred one million, five hundred eight thousand, four hundred eighty-one".