1561330212 has 48 divisors (see below), whose sum is σ = 3981926592. Its totient is φ = 473235840.

The previous prime is 1561330207. The next prime is 1561330213. The reversal of 1561330212 is 2120331651.

It is not an unprimeable number, because it can be changed into a prime (1561330213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64239 + ... + 85142.

It is an arithmetic number, because the mean of its divisors is an integer number (82956804).

Almost surely, 2^1561330212 is an apocalyptic number.

1561330212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561330212 is an abundant number, since it is smaller than the sum of its proper divisors (2420596380).

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

1561330212 is a wasteful number, since it uses less digits than its factorization.

1561330212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149468 (or 149466 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1561330212 is about 39513.6712037745. The cubic root of 1561330212 is about 1160.1075534441.

Adding to 1561330212 its reverse (2120331651), we get a palindrome (3681661863).

The spelling of 1561330212 in words is "one billion, five hundred sixty-one million, three hundred thirty thousand, two hundred twelve".