7220072551 has 4 divisors (see below), whose sum is σ = 7469040600. Its totient is φ = 6971104504.

The previous prime is 7220072539. The next prime is 7220072591. The reversal of 7220072551 is 1552700227.

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 7220072551 - 2²⁷ = 7085854823 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 (7220072591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124483981 + ... + 124484038.

It is an arithmetic number, because the mean of its divisors is an integer number (1867260150).

Almost surely, 2^7220072551 is an apocalyptic number.

7220072551 is a deficient number, since it is larger than the sum of its proper divisors (248968049).

7220072551 is a wasteful number, since it uses less digits than its factorization.

7220072551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248968048.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 7220072551 is about 84971.0100622559. The cubic root of 7220072551 is about 1932.7715334120.

Adding to 7220072551 its reverse (1552700227), we get a palindrome (8772772778).

The spelling of 7220072551 in words is "seven billion, two hundred twenty million, seventy-two thousand, five hundred fifty-one".