30513105 has 80 divisors (see below), whose sum is σ = 64120320. Its totient is φ = 13592448.

The previous prime is 30513097. The next prime is 30513127. The reversal of 30513105 is 50131503.

It is a happy number.

It is not a de Polignac number, because 30513105 - 2³ = 30513097 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 133131 + ... + 133359.

It is an arithmetic number, because the mean of its divisors is an integer number (801504).

Almost surely, 2^30513105 is an apocalyptic number.

30513105 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30513105 is an abundant number, since it is smaller than the sum of its proper divisors (33607215).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30513105 is a wasteful number, since it uses less digits than its factorization.

30513105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 30513105 is about 5523.8668521245. The cubic root of 30513105 is about 312.4847309873.

Adding to 30513105 its reverse (50131503), we get a palindrome (80644608).

The spelling of 30513105 in words is "thirty million, five hundred thirteen thousand, one hundred five".