7421551247 has 4 divisors (see below), whose sum is σ = 8096237736. Its totient is φ = 6746864760.

The previous prime is 7421551231. The next prime is 7421551303.

It is a happy number.

7421551247 is nontrivially palindromic in base 10.

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 7421551247 - 2⁴ = 7421551231 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 7421551247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421851247) 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, 337343228 + ... + 337343249.

It is an arithmetic number, because the mean of its divisors is an integer number (2024059434).

Almost surely, 2^7421551247 is an apocalyptic number.

7421551247 is a deficient number, since it is larger than the sum of its proper divisors (674686489).

7421551247 is a wasteful number, since it uses less digits than its factorization.

7421551247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674686488.

The product of its digits is 78400, while the sum is 38.

The square root of 7421551247 is about 86148.4256791730. The cubic root of 7421551247 is about 1950.5850751058.

The spelling of 7421551247 in words is "seven billion, four hundred twenty-one million, five hundred fifty-one thousand, two hundred forty-seven".