401522561 has 8 divisors (see below), whose sum is σ = 441902304. Its totient is φ = 361789120.

The previous prime is 401522549. The next prime is 401522567. The reversal of 401522561 is 165225104.

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

It is not a de Polignac number, because 401522561 - 2²⁶ = 334413697 is a prime.

It is a super-2 number, since 2×401522561² = 322440733983997442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401522561.

It is not an unprimeable number, because it can be changed into a prime (401522567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160271 + ... + 162756.

It is an arithmetic number, because the mean of its divisors is an integer number (55237788).

Almost surely, 2^401522561 is an apocalyptic number.

It is an amenable number.

401522561 is a deficient number, since it is larger than the sum of its proper divisors (40379743).

401522561 is a wasteful number, since it uses less digits than its factorization.

401522561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323151.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 401522561 is about 20038.0278720237. The cubic root of 401522561 is about 737.7399765254.

Adding to 401522561 its reverse (165225104), we get a palindrome (566747665).

The spelling of 401522561 in words is "four hundred one million, five hundred twenty-two thousand, five hundred sixty-one".