1561354232 has 16 divisors (see below), whose sum is σ = 2942402760. Its totient is φ = 776713504.

The previous prime is 1561354217. The next prime is 1561354247. The reversal of 1561354232 is 2324531651.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1561354217) and next prime (1561354247).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493778 + ... + 496929.

Almost surely, 2^1561354232 is an apocalyptic number.

It is an amenable number.

1561354232 is a deficient number, since it is larger than the sum of its proper divisors (1381048528).

1561354232 is a wasteful number, since it uses less digits than its factorization.

1561354232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990910 (or 990906 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 1561354232 is about 39513.9751480410. The cubic root of 1561354232 is about 1160.1135025679.

Adding to 1561354232 its reverse (2324531651), we get a palindrome (3885885883).

The spelling of 1561354232 in words is "one billion, five hundred sixty-one million, three hundred fifty-four thousand, two hundred thirty-two".