561210251 has 8 divisors (see below), whose sum is σ = 644640480. Its totient is φ = 478594368.

The previous prime is 561210241. The next prime is 561210253. The reversal of 561210251 is 152012165.

It is a happy number.

561210251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561210251 - 2¹⁸ = 560948107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561210253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202106 + ... + 204863.

It is an arithmetic number, because the mean of its divisors is an integer number (80580060).

Almost surely, 2^561210251 is an apocalyptic number.

561210251 is a deficient number, since it is larger than the sum of its proper divisors (83430229).

561210251 is a wasteful number, since it uses less digits than its factorization.

561210251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407173.

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

The square root of 561210251 is about 23689.8765509658. The cubic root of 561210251 is about 824.8504172024.

The spelling of 561210251 in words is "five hundred sixty-one million, two hundred ten thousand, two hundred fifty-one".