722156226 has 32 divisors (see below), whose sum is σ = 1668299328. Its totient is φ = 205962240.

The previous prime is 722156213. The next prime is 722156249. The reversal of 722156226 is 622651227.

It is a super-3 number, since 3×722156226³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320695 + ... + 322938.

It is an arithmetic number, because the mean of its divisors is an integer number (52134354).

Almost surely, 2^722156226 is an apocalyptic number.

722156226 is an abundant number, since it is smaller than the sum of its proper divisors (946143102).

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

722156226 is a wasteful number, since it uses less digits than its factorization.

722156226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643666.

The product of its digits is 20160, while the sum is 33.

The square root of 722156226 is about 26872.9645926906. The cubic root of 722156226 is about 897.1747725901.

The spelling of 722156226 in words is "seven hundred twenty-two million, one hundred fifty-six thousand, two hundred twenty-six".