16252821427 has 2 divisors, whose sum is σ = 16252821428. Its totient is φ = 16252821426.

The previous prime is 16252821379. The next prime is 16252821463. The reversal of 16252821427 is 72412825261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16252821427 is a prime.

It is a super-3 number, since 3×16252821427³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16252821427.

It is not a weakly prime, because it can be changed into another prime (16252827427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8126410713 + 8126410714.

It is an arithmetic number, because the mean of its divisors is an integer number (8126410714).

Almost surely, 2^16252821427 is an apocalyptic number.

16252821427 is a deficient number, since it is larger than the sum of its proper divisors (1).

16252821427 is an equidigital number, since it uses as much as digits as its factorization.

16252821427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The spelling of 16252821427 in words is "sixteen billion, two hundred fifty-two million, eight hundred twenty-one thousand, four hundred twenty-seven".