401523553 has 2 divisors, whose sum is σ = 401523554. Its totient is φ = 401523552.

The previous prime is 401523509. The next prime is 401523559. The reversal of 401523553 is 355325104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300259584 + 101263969 = 17328^2 + 10063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401523553 is a prime.

It is a super-2 number, since 2×401523553² = 322442327227487618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401523559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200761776 + 200761777.

It is an arithmetic number, because the mean of its divisors is an integer number (200761777).

Almost surely, 2^401523553 is an apocalyptic number.

It is an amenable number.

401523553 is a deficient number, since it is larger than the sum of its proper divisors (1).

401523553 is an equidigital number, since it uses as much as digits as its factorization.

401523553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 401523553 is about 20038.0526249434. The cubic root of 401523553 is about 737.7405840774.

Adding to 401523553 its reverse (355325104), we get a palindrome (756848657).

The spelling of 401523553 in words is "four hundred one million, five hundred twenty-three thousand, five hundred fifty-three".