30421031 has 2 divisors, whose sum is σ = 30421032. Its totient is φ = 30421030.

The previous prime is 30421021. The next prime is 30421051. The reversal of 30421031 is 13012403.

It is a weak prime.

It is an emirp because it is prime and its reverse (13012403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30421031 - 2²² = 26226727 is a prime.

It is a super-2 number, since 2×30421031² = 1850878254205922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30420997 and 30421015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30421021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210515 + 15210516.

It is an arithmetic number, because the mean of its divisors is an integer number (15210516).

Almost surely, 2^30421031 is an apocalyptic number.

30421031 is a deficient number, since it is larger than the sum of its proper divisors (1).

30421031 is an equidigital number, since it uses as much as digits as its factorization.

30421031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30421031 is about 5515.5263574749. The cubic root of 30421031 is about 312.1701043429.

Adding to 30421031 its reverse (13012403), we get a palindrome (43433434).

The spelling of 30421031 in words is "thirty million, four hundred twenty-one thousand, thirty-one".