30481631 has 2 divisors, whose sum is σ = 30481632. Its totient is φ = 30481630.

The previous prime is 30481609. The next prime is 30481657. The reversal of 30481631 is 13618403.

It is an a-pointer prime, because the next prime (30481657) can be obtained adding 30481631 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30481631 - 2¹⁰ = 30480607 is a prime.

It is a super-2 number, since 2×30481631² = 1858259656840322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30481631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30481331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15240815 + 15240816.

It is an arithmetic number, because the mean of its divisors is an integer number (15240816).

Almost surely, 2^30481631 is an apocalyptic number.

30481631 is a deficient number, since it is larger than the sum of its proper divisors (1).

30481631 is an equidigital number, since it uses as much as digits as its factorization.

30481631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 30481631 is about 5521.0172070009. The cubic root of 30481631 is about 312.3772522719.

The spelling of 30481631 in words is "thirty million, four hundred eighty-one thousand, six hundred thirty-one".