401631016 has 8 divisors (see below), whose sum is σ = 753058170. Its totient is φ = 200815504.

The previous prime is 401631007. The next prime is 401631019. The reversal of 401631016 is 610136104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 382358916 + 19272100 = 19554^2 + 4390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×401631016² = 322614946026384512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401631019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25101931 + ... + 25101946.

Almost surely, 2^401631016 is an apocalyptic number.

It is an amenable number.

401631016 is a deficient number, since it is larger than the sum of its proper divisors (351427154).

401631016 is a wasteful number, since it uses less digits than its factorization.

401631016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50203883 (or 50203879 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 401631016 is about 20040.7339186967. The cubic root of 401631016 is about 737.8063940356.

The spelling of 401631016 in words is "four hundred one million, six hundred thirty-one thousand, sixteen".