631454161 has 16 divisors (see below), whose sum is σ = 706199760. Its totient is φ = 560839680.

The previous prime is 631454143. The next prime is 631454177. The reversal of 631454161 is 161454136.

631454161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 10497600 + 620956561 = 3240^2 + 24919^2 .

It is a cyclic number.

It is not a de Polignac number, because 631454161 - 2⁵ = 631454129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631454101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30795 + ... + 47023.

It is an arithmetic number, because the mean of its divisors is an integer number (44137485).

Almost surely, 2^631454161 is an apocalyptic number.

It is an amenable number.

631454161 is a deficient number, since it is larger than the sum of its proper divisors (74745599).

631454161 is a wasteful number, since it uses less digits than its factorization.

631454161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16356.

The product of its digits is 8640, while the sum is 31.

The square root of 631454161 is about 25128.7516800974. The cubic root of 631454161 is about 857.9209564347.

The spelling of 631454161 in words is "six hundred thirty-one million, four hundred fifty-four thousand, one hundred sixty-one".