30125512381 has 2 divisors, whose sum is σ = 30125512382. Its totient is φ = 30125512380.

The previous prime is 30125512331. The next prime is 30125512433. The reversal of 30125512381 is 18321552103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23675976900 + 6449535481 = 153870^2 + 80309^2 .

It is a cyclic number.

It is not a de Polignac number, because 30125512381 - 2⁷ = 30125512253 is a prime.

It is a super-2 number, since 2×30125512381² (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 (30125512331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15062756190 + 15062756191.

It is an arithmetic number, because the mean of its divisors is an integer number (15062756191).

Almost surely, 2^30125512381 is an apocalyptic number.

It is an amenable number.

30125512381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30125512381 is an equidigital number, since it uses as much as digits as its factorization.

30125512381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 30125512381 in words is "thirty billion, one hundred twenty-five million, five hundred twelve thousand, three hundred eighty-one".