7220156 has 6 divisors (see below), whose sum is σ = 12635280. Its totient is φ = 3610076.

The previous prime is 7220153. The next prime is 7220167. The reversal of 7220156 is 6510227.

It is a super-3 number, since 3×7220156³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902516 + ... + 902523.

It is an arithmetic number, because the mean of its divisors is an integer number (2105880).

Almost surely, 2^7220156 is an apocalyptic number.

It is an amenable number.

7220156 is a deficient number, since it is larger than the sum of its proper divisors (5415124).

7220156 is a wasteful number, since it uses less digits than its factorization.

7220156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805043 (or 1805041 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 7220156 is about 2687.0347969463. The cubic root of 7220156 is about 193.2778979654.

The spelling of 7220156 in words is "seven million, two hundred twenty thousand, one hundred fifty-six".