1561003312 has 40 divisors (see below), whose sum is σ = 3330268992. Its totient is φ = 702907200.

The previous prime is 1561003277. The next prime is 1561003333. The reversal of 1561003312 is 2133001651.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22614 + ... + 60277.

Almost surely, 2^1561003312 is an apocalyptic number.

It is an amenable number.

1561003312 is an abundant number, since it is smaller than the sum of its proper divisors (1769265680).

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

1561003312 is a wasteful number, since it uses less digits than its factorization.

1561003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83017 (or 83011 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1561003312 is about 39509.5344442326. The cubic root of 1561003312 is about 1160.0265828232.

Adding to 1561003312 its reverse (2133001651), we get a palindrome (3694004963).

The spelling of 1561003312 in words is "one billion, five hundred sixty-one million, three thousand, three hundred twelve".