1561437232 has 20 divisors (see below), whose sum is σ = 3025919176. Its totient is φ = 780554880.

The previous prime is 1561437181. The next prime is 1561437289. The reversal of 1561437232 is 2327341651.

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, 114523 + ... + 127429.

Almost surely, 2^1561437232 is an apocalyptic number.

It is an amenable number.

1561437232 is a deficient number, since it is larger than the sum of its proper divisors (1464481944).

1561437232 is a wasteful number, since it uses less digits than its factorization.

1561437232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20476 (or 20470 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 1561437232 is about 39515.0253954113. The cubic root of 1561437232 is about 1160.1340590209.

Adding to 1561437232 its reverse (2327341651), we get a palindrome (3888778883).

The spelling of 1561437232 in words is "one billion, five hundred sixty-one million, four hundred thirty-seven thousand, two hundred thirty-two".