5250021551 has 4 divisors (see below), whose sum is σ = 5316477600. Its totient is φ = 5183565504.

The previous prime is 5250021529. The next prime is 5250021559. The reversal of 5250021551 is 1551200525.

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 5250021551 - 2⁶ = 5250021487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5250021551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5250021559) 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, 33227906 + ... + 33228063.

It is an arithmetic number, because the mean of its divisors is an integer number (1329119400).

Almost surely, 2^5250021551 is an apocalyptic number.

5250021551 is a deficient number, since it is larger than the sum of its proper divisors (66456049).

5250021551 is an equidigital number, since it uses as much as digits as its factorization.

5250021551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66456048.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 5250021551 is about 72457.0324468233. The cubic root of 5250021551 is about 1738.0157005939.

The spelling of 5250021551 in words is "five billion, two hundred fifty million, twenty-one thousand, five hundred fifty-one".