30457875421 has 2 divisors, whose sum is σ = 30457875422. Its totient is φ = 30457875420.

The previous prime is 30457875403. The next prime is 30457875493. The reversal of 30457875421 is 12457875403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22826979396 + 7630896025 = 151086^2 + 87355^2 .

It is an emirp because it is prime and its reverse (12457875403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30457875421 - 2¹³ = 30457867229 is a prime.

It is a super-2 number, since 2×30457875421² (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 (30457875521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15228937710 + 15228937711.

It is an arithmetic number, because the mean of its divisors is an integer number (15228937711).

Almost surely, 2^30457875421 is an apocalyptic number.

It is an amenable number.

30457875421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30457875421 is an equidigital number, since it uses as much as digits as its factorization.

30457875421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940800, while the sum is 46.

The spelling of 30457875421 in words is "thirty billion, four hundred fifty-seven million, eight hundred seventy-five thousand, four hundred twenty-one".