30109431 has 32 divisors (see below), whose sum is σ = 46780416. Its totient is φ = 17024000.

The previous prime is 30109423. The next prime is 30109451. The reversal of 30109431 is 13490103.

It is a cyclic number.

It is not a de Polignac number, because 30109431 - 2³ = 30109423 is a prime.

It is a super-2 number, since 2×30109431² = 1813155670287522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30109398 and 30109407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30109421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107011 + ... + 107291.

It is an arithmetic number, because the mean of its divisors is an integer number (1461888).

Almost surely, 2^30109431 is an apocalyptic number.

30109431 is a deficient number, since it is larger than the sum of its proper divisors (16670985).

30109431 is a wasteful number, since it uses less digits than its factorization.

30109431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 30109431 is about 5487.2061196933. The cubic root of 30109431 is about 311.1006005472.

Adding to 30109431 its reverse (13490103), we get a palindrome (43599534).

The spelling of 30109431 in words is "thirty million, one hundred nine thousand, four hundred thirty-one".