5551245491 has 4 divisors (see below), whose sum is σ = 6055904184. Its totient is φ = 5046586800.

The previous prime is 5551245473. The next prime is 5551245517. The reversal of 5551245491 is 1945421555.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5551245491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5551245451) 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, 252329330 + ... + 252329351.

It is an arithmetic number, because the mean of its divisors is an integer number (1513976046).

Almost surely, 2^5551245491 is an apocalyptic number.

5551245491 is a deficient number, since it is larger than the sum of its proper divisors (504658693).

5551245491 is a wasteful number, since it uses less digits than its factorization.

5551245491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504658692.

The product of its digits is 180000, while the sum is 41.

The square root of 5551245491 is about 74506.6808480958. The cubic root of 5551245491 is about 1770.6394841060.

The spelling of 5551245491 in words is "five billion, five hundred fifty-one million, two hundred forty-five thousand, four hundred ninety-one".