1522825921 has 2 divisors, whose sum is σ = 1522825922. Its totient is φ = 1522825920.

The previous prime is 1522825919. The next prime is 1522825933. The reversal of 1522825921 is 1295282251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 935442225 + 587383696 = 30585^2 + 24236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522825921 - 2¹ = 1522825919 is a prime.

Together with 1522825919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1522820921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761412960 + 761412961.

It is an arithmetic number, because the mean of its divisors is an integer number (761412961).

Almost surely, 2^1522825921 is an apocalyptic number.

It is an amenable number.

1522825921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522825921 is an equidigital number, since it uses as much as digits as its factorization.

1522825921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 37.

The square root of 1522825921 is about 39023.4022222563. The cubic root of 1522825921 is about 1150.4915154139.

It can be divided in two parts, 152282 and 5921, that added together give a triangular number (158203 = T₅₆₂).

The spelling of 1522825921 in words is "one billion, five hundred twenty-two million, eight hundred twenty-five thousand, nine hundred twenty-one".