1825472521 has 2 divisors, whose sum is σ = 1825472522. Its totient is φ = 1825472520.

The previous prime is 1825472501. The next prime is 1825472543. The reversal of 1825472521 is 1252745281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1325324025 + 500148496 = 36405^2 + 22364^2 .

It is an emirp because it is prime and its reverse (1252745281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1825472521 - 2⁵ = 1825472489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1825472501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912736260 + 912736261.

It is an arithmetic number, because the mean of its divisors is an integer number (912736261).

Almost surely, 2^1825472521 is an apocalyptic number.

It is an amenable number.

1825472521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1825472521 is an equidigital number, since it uses as much as digits as its factorization.

1825472521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 37.

The square root of 1825472521 is about 42725.5488086461. The cubic root of 1825472521 is about 1222.1516542694.

The spelling of 1825472521 in words is "one billion, eight hundred twenty-five million, four hundred seventy-two thousand, five hundred twenty-one".