30861344831 has 2 divisors, whose sum is σ = 30861344832. Its totient is φ = 30861344830.

The previous prime is 30861344747. The next prime is 30861344851. The reversal of 30861344831 is 13844316803.

It is a strong prime.

It is an emirp because it is prime and its reverse (13844316803) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30861344831 is a prime.

It is a super-2 number, since 2×30861344831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30861344851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15430672415 + 15430672416.

It is an arithmetic number, because the mean of its divisors is an integer number (15430672416).

Almost surely, 2^30861344831 is an apocalyptic number.

30861344831 is a deficient number, since it is larger than the sum of its proper divisors (1).

30861344831 is an equidigital number, since it uses as much as digits as its factorization.

30861344831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 30861344831 in words is "thirty billion, eight hundred sixty-one million, three hundred forty-four thousand, eight hundred thirty-one".