561252251 has 8 divisors (see below), whose sum is σ = 650218464. Its totient is φ = 474482880.

The previous prime is 561252247. The next prime is 561252313. The reversal of 561252251 is 152252165.

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

It is a cyclic number.

It is not a de Polignac number, because 561252251 - 2² = 561252247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561252151) 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, 548660 + ... + 549681.

It is an arithmetic number, because the mean of its divisors is an integer number (81277308).

Almost surely, 2^561252251 is an apocalyptic number.

561252251 is a deficient number, since it is larger than the sum of its proper divisors (88966213).

561252251 is a wasteful number, since it uses less digits than its factorization.

561252251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098421.

The product of its digits is 6000, while the sum is 29.

The square root of 561252251 is about 23690.7629889795. The cubic root of 561252251 is about 824.8709934798.

The spelling of 561252251 in words is "five hundred sixty-one million, two hundred fifty-two thousand, two hundred fifty-one".