30722431 has 2 divisors, whose sum is σ = 30722432. Its totient is φ = 30722430.

The previous prime is 30722429. The next prime is 30722473. The reversal of 30722431 is 13422703.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30722431 - 2¹ = 30722429 is a prime.

It is a super-2 number, since 2×30722431² = 1887735533099522, which contains 22 as substring.

Together with 30722429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30722401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15361215 + 15361216.

It is an arithmetic number, because the mean of its divisors is an integer number (15361216).

Almost surely, 2^30722431 is an apocalyptic number.

30722431 is a deficient number, since it is larger than the sum of its proper divisors (1).

30722431 is an equidigital number, since it uses as much as digits as its factorization.

30722431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 30722431 is about 5542.7818827733. The cubic root of 30722431 is about 313.1976723979.

The spelling of 30722431 in words is "thirty million, seven hundred twenty-two thousand, four hundred thirty-one".