561521037 has 96 divisors (see below), whose sum is σ = 991263744. Its totient is φ = 279417600.

The previous prime is 561521027. The next prime is 561521089. The reversal of 561521037 is 730125165.

It is not a de Polignac number, because 561521037 - 2⁷ = 561520909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561520995 and 561521013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561521017) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7692033 + ... + 7692105.

It is an arithmetic number, because the mean of its divisors is an integer number (10325664).

Almost surely, 2^561521037 is an apocalyptic number.

It is an amenable number.

561521037 is a deficient number, since it is larger than the sum of its proper divisors (429742707).

561521037 is a wasteful number, since it uses less digits than its factorization.

561521037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 561521037 is about 23696.4351116365. The cubic root of 561521037 is about 825.0026504965.

The spelling of 561521037 in words is "five hundred sixty-one million, five hundred twenty-one thousand, thirty-seven".