33722731 has 8 divisors (see below), whose sum is σ = 39327200. Its totient is φ = 28904904.

The previous prime is 33722719. The next prime is 33722753. The reversal of 33722731 is 13722733.

It is not a de Polignac number, because 33722731 - 2⁹ = 33722219 is a prime.

It is a super-2 number, since 2×33722731² = 2274445172196722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33722731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33722771) 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, 48816 + ... + 49501.

It is an arithmetic number, because the mean of its divisors is an integer number (4915900).

Almost surely, 2^33722731 is an apocalyptic number.

33722731 is a deficient number, since it is larger than the sum of its proper divisors (5604469).

33722731 is an frugal number, since it uses more digits than its factorization.

33722731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98338 (or 98324 counting only the distinct ones).

The product of its digits is 5292, while the sum is 28.

The square root of 33722731 is about 5807.1276032131. The cubic root of 33722731 is about 323.0781440837.

It can be divided in two parts, 33722 and 731, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 33722731 in words is "thirty-three million, seven hundred twenty-two thousand, seven hundred thirty-one".