30855231 has 24 divisors (see below), whose sum is σ = 48868560. Its totient is φ = 18604800.

The previous prime is 30855229. The next prime is 30855257. The reversal of 30855231 is 13255803.

It is not a de Polignac number, because 30855231 - 2¹ = 30855229 is a prime.

It is a super-2 number, since 2×30855231² = 1904090560126722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30855195 and 30855204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30855211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21991 + ... + 23351.

It is an arithmetic number, because the mean of its divisors is an integer number (2036190).

Almost surely, 2^30855231 is an apocalyptic number.

30855231 is a deficient number, since it is larger than the sum of its proper divisors (18013329).

30855231 is a wasteful number, since it uses less digits than its factorization.

30855231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 30855231 is about 5554.7485091586. The cubic root of 30855231 is about 313.6482971687.

The spelling of 30855231 in words is "thirty million, eight hundred fifty-five thousand, two hundred thirty-one".