401558381 has 12 divisors (see below), whose sum is σ = 477984672. Its totient is φ = 336186648.

The previous prime is 401558329. The next prime is 401558393. The reversal of 401558381 is 183855104.

It is a de Polignac number, because none of the positive numbers 2^k-401558381 is a prime.

It is a super-2 number, since 2×401558381² = 322498266702682322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401558281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93185 + ... + 97398.

It is an arithmetic number, because the mean of its divisors is an integer number (39832056).

Almost surely, 2^401558381 is an apocalyptic number.

It is an amenable number.

401558381 is a deficient number, since it is larger than the sum of its proper divisors (76426291).

401558381 is a wasteful number, since it uses less digits than its factorization.

401558381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190640 (or 190633 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 401558381 is about 20038.9216526239. The cubic root of 401558381 is about 737.7619139064.

The spelling of 401558381 in words is "four hundred one million, five hundred fifty-eight thousand, three hundred eighty-one".