7221901670 has 16 divisors (see below), whose sum is σ = 13418759808. Its totient is φ = 2795574720.

The previous prime is 7221901669. The next prime is 7221901679. The reversal of 7221901670 is 761091227.

7221901670 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×7221901670² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7221901670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221901679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11647919 + ... + 11648538.

It is an arithmetic number, because the mean of its divisors is an integer number (838672488).

Almost surely, 2^7221901670 is an apocalyptic number.

7221901670 is a deficient number, since it is larger than the sum of its proper divisors (6196858138).

7221901670 is a wasteful number, since it uses less digits than its factorization.

7221901670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23296495.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 7221901670 is about 84981.7725750646. The cubic root of 7221901670 is about 1932.9347344793.

Adding to 7221901670 its reverse (761091227), we get a palindrome (7982992897).

The spelling of 7221901670 in words is "seven billion, two hundred twenty-one million, nine hundred one thousand, six hundred seventy".