30121431 has 8 divisors (see below), whose sum is σ = 40187904. Its totient is φ = 20067960.

The previous prime is 30121411. The next prime is 30121453. The reversal of 30121431 is 13412103.

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

It is not a de Polignac number, because 30121431 - 2⁷ = 30121303 is a prime.

It is a super-2 number, since 2×30121431² = 1814601210975522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30121431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5610 + ... + 9576.

It is an arithmetic number, because the mean of its divisors is an integer number (5023488).

Almost surely, 2^30121431 is an apocalyptic number.

30121431 is a deficient number, since it is larger than the sum of its proper divisors (10066473).

30121431 is a wasteful number, since it uses less digits than its factorization.

30121431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6501.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 30121431 is about 5488.2994634039. The cubic root of 30121431 is about 311.1419243810.

Adding to 30121431 its reverse (13412103), we get a palindrome (43533534).

The spelling of 30121431 in words is "thirty million, one hundred twenty-one thousand, four hundred thirty-one".