401556215 has 8 divisors (see below), whose sum is σ = 481984560. Its totient is φ = 321166912.

The previous prime is 401556157. The next prime is 401556223. The reversal of 401556215 is 512655104.

It is a happy number.

401556215 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 401556215 - 2¹² = 401552119 is a prime.

It is a super-2 number, since 2×401556215² = 322494787610252450, which contains 22 as substring.

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, 22676 + ... + 36294.

It is an arithmetic number, because the mean of its divisors is an integer number (60248070).

Almost surely, 2^401556215 is an apocalyptic number.

401556215 is a deficient number, since it is larger than the sum of its proper divisors (80428345).

401556215 is a wasteful number, since it uses less digits than its factorization.

401556215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19521.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 401556215 is about 20038.8676077267. The cubic root of 401556215 is about 737.7605874117.

The spelling of 401556215 in words is "four hundred one million, five hundred fifty-six thousand, two hundred fifteen".