401091055 has 4 divisors (see below), whose sum is σ = 481309272. Its totient is φ = 320872840.

The previous prime is 401091037. The next prime is 401091073. The reversal of 401091055 is 550190104.

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

It is an interprime number because it is at equal distance from previous prime (401091037) and next prime (401091073).

It is not a de Polignac number, because 401091055 - 2²³ = 392702447 is a prime.

It is a Duffinian number.

It is a congruent 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, 40109101 + ... + 40109110.

It is an arithmetic number, because the mean of its divisors is an integer number (120327318).

Almost surely, 2^401091055 is an apocalyptic number.

401091055 is a deficient number, since it is larger than the sum of its proper divisors (80218217).

401091055 is an equidigital number, since it uses as much as digits as its factorization.

401091055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80218216.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 401091055 is about 20027.2578003081. The cubic root of 401091055 is about 737.4756050535.

The spelling of 401091055 in words is "four hundred one million, ninety-one thousand, fifty-five".