6722251 has 4 divisors (see below), whose sum is σ = 6762672. Its totient is φ = 6681832.

The previous prime is 6722239. The next prime is 6722263. The reversal of 6722251 is 1522276.

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

It is an interprime number because it is at equal distance from previous prime (6722239) and next prime (6722263).

It is a cyclic number.

It is not a de Polignac number, because 6722251 - 2⁹ = 6721739 is a prime.

It is a Duffinian number.

6722251 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6722291) 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, 19960 + ... + 20293.

It is an arithmetic number, because the mean of its divisors is an integer number (1690668).

Almost surely, 2^6722251 is an apocalyptic number.

6722251 is a deficient number, since it is larger than the sum of its proper divisors (40421).

6722251 is a wasteful number, since it uses less digits than its factorization.

6722251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40420.

The product of its digits is 1680, while the sum is 25.

The square root of 6722251 is about 2592.7304140616. The cubic root of 6722251 is about 188.7288273548.

Adding to 6722251 its sum of digits (25), we get a palindrome (6722276).

The spelling of 6722251 in words is "six million, seven hundred twenty-two thousand, two hundred fifty-one".