30143099981 has 2 divisors, whose sum is σ = 30143099982. Its totient is φ = 30143099980.

The previous prime is 30143099971. The next prime is 30143100017. The reversal of 30143099981 is 18999034103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30001704100 + 141395881 = 173210^2 + 11891^2 .

It is a cyclic number.

It is not a de Polignac number, because 30143099981 - 2²⁶ = 30075991117 is a prime.

It is a super-2 number, since 2×30143099981² (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 (30143099971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15071549990 + 15071549991.

It is an arithmetic number, because the mean of its divisors is an integer number (15071549991).

Almost surely, 2^30143099981 is an apocalyptic number.

It is an amenable number.

30143099981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30143099981 is an equidigital number, since it uses as much as digits as its factorization.

30143099981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 30143099981 in words is "thirty billion, one hundred forty-three million, ninety-nine thousand, nine hundred eighty-one".