30542817 has 4 divisors (see below), whose sum is σ = 40723760. Its totient is φ = 20361876.

The previous prime is 30542807. The next prime is 30542819. The reversal of 30542817 is 71824503.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30542817 - 2¹⁰ = 30541793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30542819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5090467 + ... + 5090472.

It is an arithmetic number, because the mean of its divisors is an integer number (10180940).

Almost surely, 2^30542817 is an apocalyptic number.

It is an amenable number.

30542817 is a deficient number, since it is larger than the sum of its proper divisors (10180943).

30542817 is a wasteful number, since it uses less digits than its factorization.

30542817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180942.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 30542817 is about 5526.5556181043. Note that the first 3 decimals coincide. The cubic root of 30542817 is about 312.5861249551.

The spelling of 30542817 in words is "thirty million, five hundred forty-two thousand, eight hundred seventeen".