631561422 has 16 divisors (see below), whose sum is σ = 1268789760. Its totient is φ = 209575992.

The previous prime is 631561421. The next prime is 631561423. The reversal of 631561422 is 224165136.

It is an interprime number because it is at equal distance from previous prime (631561421) and next prime (631561423).

It is a self number, because there is not a number n which added to its sum of digits gives 631561422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631561421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234672 + ... + 237347.

It is an arithmetic number, because the mean of its divisors is an integer number (79299360).

Almost surely, 2^631561422 is an apocalyptic number.

631561422 is an abundant number, since it is smaller than the sum of its proper divisors (637228338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631561422 is a wasteful number, since it uses less digits than its factorization.

631561422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472247.

The product of its digits is 8640, while the sum is 30.

The square root of 631561422 is about 25130.8858180527. The cubic root of 631561422 is about 857.9695301637.

The spelling of 631561422 in words is "six hundred thirty-one million, five hundred sixty-one thousand, four hundred twenty-two".