30513813 has 8 divisors (see below), whose sum is σ = 44383776. Its totient is φ = 18493200.

The previous prime is 30513811. The next prime is 30513823. The reversal of 30513813 is 31831503.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30513813 - 2¹ = 30513811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30513811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462298 + ... + 462363.

It is an arithmetic number, because the mean of its divisors is an integer number (5547972).

Almost surely, 2^30513813 is an apocalyptic number.

30513813 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

30513813 is a deficient number, since it is larger than the sum of its proper divisors (13869963).

30513813 is a wasteful number, since it uses less digits than its factorization.

30513813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924675.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 30513813 is about 5523.9309372946. The cubic root of 30513813 is about 312.4871478448.

The spelling of 30513813 in words is "thirty million, five hundred thirteen thousand, eight hundred thirteen".