561551213 has 8 divisors (see below), whose sum is σ = 596961120. Its totient is φ = 526726800.

The previous prime is 561551189. The next prime is 561551231. The reversal of 561551213 is 312155165.

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 561551213 - 2²⁴ = 544773997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561551413) 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, 144395 + ... + 148232.

It is an arithmetic number, because the mean of its divisors is an integer number (74620140).

Almost surely, 2^561551213 is an apocalyptic number.

It is an amenable number.

561551213 is a deficient number, since it is larger than the sum of its proper divisors (35409907).

561551213 is a wasteful number, since it uses less digits than its factorization.

561551213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292747.

The product of its digits is 4500, while the sum is 29.

The square root of 561551213 is about 23697.0718233287. The cubic root of 561551213 is about 825.0174287105.

The spelling of 561551213 in words is "five hundred sixty-one million, five hundred fifty-one thousand, two hundred thirteen".