30815973 has 24 divisors (see below), whose sum is σ = 45796608. Its totient is φ = 19958112.

The previous prime is 30815933. The next prime is 30815989. The reversal of 30815973 is 37951803.

It is not a de Polignac number, because 30815973 - 2⁶ = 30815909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30815903) 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, 111111 + ... + 111387.

It is an arithmetic number, because the mean of its divisors is an integer number (1908192).

Almost surely, 2^30815973 is an apocalyptic number.

It is an amenable number.

30815973 is a deficient number, since it is larger than the sum of its proper divisors (14980635).

30815973 is a wasteful number, since it uses less digits than its factorization.

30815973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 30815973 is about 5551.2136510857. The cubic root of 30815973 is about 313.5152194560.

It can be divided in two parts, 30 and 815973, that added together give a triangular number (816003 = T₁₂₇₇).

The spelling of 30815973 in words is "thirty million, eight hundred fifteen thousand, nine hundred seventy-three".