401504523 has 32 divisors (see below), whose sum is σ = 646041600. Its totient is φ = 216673056.

The previous prime is 401504497. The next prime is 401504549. The reversal of 401504523 is 325405104.

It is an interprime number because it is at equal distance from previous prime (401504497) and next prime (401504549).

It is not a de Polignac number, because 401504523 - 2¹⁰ = 401503499 is a prime.

It is a super-2 number, since 2×401504523² = 322411763978915058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401504493 and 401504502.

It is not an unprimeable number, because it can be changed into a prime (401504563) 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, 141840 + ... + 144642.

It is an arithmetic number, because the mean of its divisors is an integer number (20188800).

Almost surely, 2^401504523 is an apocalyptic number.

401504523 is a deficient number, since it is larger than the sum of its proper divisors (244537077).

401504523 is a wasteful number, since it uses less digits than its factorization.

401504523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 401504523 is about 20037.5777727748. The cubic root of 401504523 is about 737.7289289495.

Adding to 401504523 its reverse (325405104), we get a palindrome (726909627).

The spelling of 401504523 in words is "four hundred one million, five hundred four thousand, five hundred twenty-three".