7222140 has 36 divisors (see below), whose sum is σ = 21907704. Its totient is φ = 1925856.

The previous prime is 7222133. The next prime is 7222153. The reversal of 7222140 is 412227.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19882 + ... + 20241.

Almost surely, 2^7222140 is an apocalyptic number.

It is an amenable number.

7222140 is an abundant number, since it is smaller than the sum of its proper divisors (14685564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7222140 is a wasteful number, since it uses less digits than its factorization.

7222140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40138 (or 40133 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7222140 is about 2687.4039517720. The cubic root of 7222140 is about 193.2955997174.

Adding to 7222140 its reverse (412227), we get a palindrome (7634367).

The spelling of 7222140 in words is "seven million, two hundred twenty-two thousand, one hundred forty".