30542881 has 4 divisors (see below), whose sum is σ = 30566592. Its totient is φ = 30519172.

The previous prime is 30542867. The next prime is 30542927. The reversal of 30542881 is 18824503.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18824503 = 587 ⋅32069.

It is a cyclic number.

It is not a de Polignac number, because 30542881 - 2⁵ = 30542849 is a prime.

It is a super-2 number, since 2×30542881² = 1865735159560322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30542381) 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, 9805 + ... + 12538.

It is an arithmetic number, because the mean of its divisors is an integer number (7641648).

Almost surely, 2^30542881 is an apocalyptic number.

It is an amenable number.

30542881 is a deficient number, since it is larger than the sum of its proper divisors (23711).

30542881 is a wasteful number, since it uses less digits than its factorization.

30542881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23710.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 30542881 is about 5526.5614083262. The cubic root of 30542881 is about 312.5863432879.

The spelling of 30542881 in words is "thirty million, five hundred forty-two thousand, eight hundred eighty-one".