1631231244 has 144 divisors (see below), whose sum is σ = 4553315200. Its totient is φ = 503620416.

The previous prime is 1631231213. The next prime is 1631231293. The reversal of 1631231244 is 4421321361.

It is a happy number.

1631231244 is a `hidden beast` number, since 1 + 631 + 2 + 3 + 1 + 24 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5763927 + ... + 5764209.

Almost surely, 2^1631231244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1631231244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2276657600).

1631231244 is an abundant number, since it is smaller than the sum of its proper divisors (2922083956).

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

1631231244 is a wasteful number, since it uses less digits than its factorization.

1631231244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 360 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1631231244 is about 40388.5038593905. The cubic root of 1631231244 is about 1177.1681697115.

The spelling of 1631231244 in words is "one billion, six hundred thirty-one million, two hundred thirty-one thousand, two hundred forty-four".