22155331 has 4 divisors (see below), whose sum is σ = 24169464. Its totient is φ = 20141200.

The previous prime is 22155317. The next prime is 22155361. The reversal of 22155331 is 13355122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22155331 - 2⁵ = 22155299 is a prime.

It is a super-2 number, since 2×22155331² = 981717383439122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22155361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007050 + ... + 1007071.

It is an arithmetic number, because the mean of its divisors is an integer number (6042366).

Almost surely, 2^22155331 is an apocalyptic number.

22155331 is a deficient number, since it is larger than the sum of its proper divisors (2014133).

22155331 is a wasteful number, since it uses less digits than its factorization.

22155331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014132.

The product of its digits is 900, while the sum is 22.

The square root of 22155331 is about 4706.9449752467. The cubic root of 22155331 is about 280.8618470424.

The spelling of 22155331 in words is "twenty-two million, one hundred fifty-five thousand, three hundred thirty-one".