30155493 has 8 divisors (see below), whose sum is σ = 40337856. Its totient is φ = 20038400.

The previous prime is 30155483. The next prime is 30155509. The reversal of 30155493 is 39455103.

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

It is a cyclic number.

It is not a de Polignac number, because 30155493 - 2⁹ = 30154981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30155493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30155473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15228 + ... + 17093.

It is an arithmetic number, because the mean of its divisors is an integer number (5042232).

Almost surely, 2^30155493 is an apocalyptic number.

It is an amenable number.

30155493 is a deficient number, since it is larger than the sum of its proper divisors (10182363).

30155493 is a wasteful number, since it uses less digits than its factorization.

30155493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32635.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 30155493 is about 5491.4017336196. The cubic root of 30155493 is about 311.2591623244.

The spelling of 30155493 in words is "thirty million, one hundred fifty-five thousand, four hundred ninety-three".