561215707 has 6 divisors (see below), whose sum is σ = 607707132. Its totient is φ = 518045112.

The previous prime is 561215639. The next prime is 561215717. The reversal of 561215707 is 707512165.

It is a happy number.

It is not a de Polignac number, because 561215707 - 2¹⁹ = 560691419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561215717) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1660233 + ... + 1660570.

It is an arithmetic number, because the mean of its divisors is an integer number (101284522).

Almost surely, 2^561215707 is an apocalyptic number.

561215707 is a deficient number, since it is larger than the sum of its proper divisors (46491425).

561215707 is a wasteful number, since it uses less digits than its factorization.

561215707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320829 (or 3320816 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 561215707 is about 23689.9917053595. The cubic root of 561215707 is about 824.8530902168.

The spelling of 561215707 in words is "five hundred sixty-one million, two hundred fifteen thousand, seven hundred seven".