401520523 has 2 divisors, whose sum is σ = 401520524. Its totient is φ = 401520522.

The previous prime is 401520487. The next prime is 401520557. The reversal of 401520523 is 325025104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401520523 - 2²¹ = 399423371 is a prime.

It is a super-2 number, since 2×401520523² = 322437460780387058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401520494 and 401520503.

It is not a weakly prime, because it can be changed into another prime (401520583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200760261 + 200760262.

It is an arithmetic number, because the mean of its divisors is an integer number (200760262).

Almost surely, 2^401520523 is an apocalyptic number.

401520523 is a deficient number, since it is larger than the sum of its proper divisors (1).

401520523 is an equidigital number, since it uses as much as digits as its factorization.

401520523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 401520523 is about 20037.9770186514. The cubic root of 401520523 is about 737.7387283460.

Adding to 401520523 its reverse (325025104), we get a palindrome (726545627).

The spelling of 401520523 in words is "four hundred one million, five hundred twenty thousand, five hundred twenty-three".