1631447252 has 12 divisors (see below), whose sum is σ = 2887112340. Its totient is φ = 806558016.

The previous prime is 1631447197. The next prime is 1631447269. The reversal of 1631447252 is 2527441361.

It can be written as a sum of positive squares in 2 ways, for example, as 1113156496 + 518290756 = 33364^2 + 22766^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2291003 + ... + 2291714.

It is an arithmetic number, because the mean of its divisors is an integer number (240592695).

Almost surely, 2^1631447252 is an apocalyptic number.

It is an amenable number.

1631447252 is a deficient number, since it is larger than the sum of its proper divisors (1255665088).

1631447252 is a wasteful number, since it uses less digits than its factorization.

1631447252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582810 (or 4582808 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 1631447252 is about 40391.1778981500. The cubic root of 1631447252 is about 1177.2201277074.

The spelling of 1631447252 in words is "one billion, six hundred thirty-one million, four hundred forty-seven thousand, two hundred fifty-two".