401553305 has 4 divisors (see below), whose sum is σ = 481863972. Its totient is φ = 321242640.

The previous prime is 401553293. The next prime is 401553329. The reversal of 401553305 is 503355104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45212176 + 356341129 = 6724^2 + 18877^2 .

It is not a de Polignac number, because 401553305 - 2¹² = 401549209 is a prime.

It is a super-2 number, since 2×401553305² = 322490113512846050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40155326 + ... + 40155335.

It is an arithmetic number, because the mean of its divisors is an integer number (120465993).

Almost surely, 2^401553305 is an apocalyptic number.

It is an amenable number.

401553305 is a deficient number, since it is larger than the sum of its proper divisors (80310667).

401553305 is an equidigital number, since it uses as much as digits as its factorization.

401553305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80310666.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 401553305 is about 20038.7949987019. The cubic root of 401553305 is about 737.7588052715.

The spelling of 401553305 in words is "four hundred one million, five hundred fifty-three thousand, three hundred five".