561251201 has 4 divisors (see below), whose sum is σ = 641429952. Its totient is φ = 481072452.

The previous prime is 561251191. The next prime is 561251231. The reversal of 561251201 is 102152165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 561251201 - 2²² = 557056897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561251231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40089365 + ... + 40089378.

It is an arithmetic number, because the mean of its divisors is an integer number (160357488).

Almost surely, 2^561251201 is an apocalyptic number.

It is an amenable number.

561251201 is a deficient number, since it is larger than the sum of its proper divisors (80178751).

561251201 is an equidigital number, since it uses as much as digits as its factorization.

561251201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80178750.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 561251201 is about 23690.7408284334. The cubic root of 561251201 is about 824.8704790853.

The spelling of 561251201 in words is "five hundred sixty-one million, two hundred fifty-one thousand, two hundred one".