1561224132 has 60 divisors (see below), whose sum is σ = 4395309996. Its totient is φ = 480375360.

The previous prime is 1561224101. The next prime is 1561224157. The reversal of 1561224132 is 2314221651.

1561224132 is a `hidden beast` number, since 1 + 5 + 612 + 2 + 41 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 60746436 + 1500477696 = 7794^2 + 38736^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1561224096 and 1561224105.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 181119 + ... + 189542.

Almost surely, 2^1561224132 is an apocalyptic number.

1561224132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561224132 is an abundant number, since it is smaller than the sum of its proper divisors (2834085864).

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

1561224132 is a wasteful number, since it uses less digits than its factorization.

1561224132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370690 (or 370679 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1561224132 is about 39512.3288607493. The cubic root of 1561224132 is about 1160.0812794811.

Adding to 1561224132 its reverse (2314221651), we get a palindrome (3875445783).

The spelling of 1561224132 in words is "one billion, five hundred sixty-one million, two hundred twenty-four thousand, one hundred thirty-two".