401555155 has 8 divisors (see below), whose sum is σ = 484151184. Its totient is φ = 319720800.

The previous prime is 401555129. The next prime is 401555173. The reversal of 401555155 is 551555104.

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

It is not a de Polignac number, because 401555155 - 2⁵ = 401555123 is a prime.

It is a super-2 number, since 2×401555155² = 322493085014148050, 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 7 ways as a sum of consecutive naturals, for example, 189256 + ... + 191365.

It is an arithmetic number, because the mean of its divisors is an integer number (60518898).

Almost surely, 2^401555155 is an apocalyptic number.

401555155 is a deficient number, since it is larger than the sum of its proper divisors (82596029).

401555155 is a wasteful number, since it uses less digits than its factorization.

401555155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380837.

The product of its (nonzero) digits is 12500, while the sum is 31.

The square root of 401555155 is about 20038.8411591090. The cubic root of 401555155 is about 737.7599382482.

The spelling of 401555155 in words is "four hundred one million, five hundred fifty-five thousand, one hundred fifty-five".