30855031 has 12 divisors (see below), whose sum is σ = 32869632. Its totient is φ = 28957824.

The previous prime is 30855023. The next prime is 30855047. The reversal of 30855031 is 13055803.

It is a happy number.

It is not a de Polignac number, because 30855031 - 2³ = 30855023 is a prime.

It is a super-2 number, since 2×30855031² = 1904065876021922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30854987 and 30855005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30855061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45511 + ... + 46183.

It is an arithmetic number, because the mean of its divisors is an integer number (2739136).

Almost surely, 2^30855031 is an apocalyptic number.

30855031 is a deficient number, since it is larger than the sum of its proper divisors (2014601).

30855031 is a wasteful number, since it uses less digits than its factorization.

30855031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 30855031 is about 5554.7305065142. The cubic root of 30855031 is about 313.6476194900.

The spelling of 30855031 in words is "thirty million, eight hundred fifty-five thousand, thirty-one".