30540831 has 4 divisors (see below), whose sum is σ = 40721112. Its totient is φ = 20360552.

The previous prime is 30540817. The next prime is 30540877. The reversal of 30540831 is 13804503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13804503 = 3 ⋅4601501.

It is a cyclic number.

It is not a de Polignac number, because 30540831 - 2⁷ = 30540703 is a prime.

It is a super-2 number, since 2×30540831² = 1865484716341122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30540131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5090136 + ... + 5090141.

It is an arithmetic number, because the mean of its divisors is an integer number (10180278).

Almost surely, 2^30540831 is an apocalyptic number.

30540831 is a deficient number, since it is larger than the sum of its proper divisors (10180281).

30540831 is a wasteful number, since it uses less digits than its factorization.

30540831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10180280.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 30540831 is about 5526.3759372667. The cubic root of 30540831 is about 312.5793496632.

The spelling of 30540831 in words is "thirty million, five hundred forty thousand, eight hundred thirty-one".