400555255 has 8 divisors (see below), whose sum is σ = 482662224. Its totient is φ = 319113600.

The previous prime is 400555231. The next prime is 400555273. The reversal of 400555255 is 552555004.

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

It is not a de Polignac number, because 400555255 - 2⁵ = 400555223 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 7 ways as a sum of consecutive naturals, for example, 165001 + ... + 167410.

It is an arithmetic number, because the mean of its divisors is an integer number (60332778).

Almost surely, 2^400555255 is an apocalyptic number.

400555255 is a deficient number, since it is larger than the sum of its proper divisors (82106969).

400555255 is a wasteful number, since it uses less digits than its factorization.

400555255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332657.

The product of its (nonzero) digits is 25000, while the sum is 31.

The square root of 400555255 is about 20013.8765610264. The cubic root of 400555255 is about 737.1470715823.

The spelling of 400555255 in words is "four hundred million, five hundred fifty-five thousand, two hundred fifty-five".