5561242251 has 4 divisors (see below), whose sum is σ = 7414989672. Its totient is φ = 3707494832.

The previous prime is 5561242199. The next prime is 5561242279. The reversal of 5561242251 is 1522421655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5561242251 - 2⁶ = 5561242187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5561242651) 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, 926873706 + ... + 926873711.

It is an arithmetic number, because the mean of its divisors is an integer number (1853747418).

Almost surely, 2^5561242251 is an apocalyptic number.

5561242251 is a deficient number, since it is larger than the sum of its proper divisors (1853747421).

5561242251 is a wasteful number, since it uses less digits than its factorization.

5561242251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853747420.

The product of its digits is 24000, while the sum is 33.

The square root of 5561242251 is about 74573.7370057314. The cubic root of 5561242251 is about 1771.7017107972.

It can be divided in two parts, 5 and 561242251, that added together give a triangular number (561242256 = T₃₃₅₀₃).

The spelling of 5561242251 in words is "five billion, five hundred sixty-one million, two hundred forty-two thousand, two hundred fifty-one".