1521481853 has 2 divisors, whose sum is σ = 1521481854. Its totient is φ = 1521481852.

The previous prime is 1521481823. The next prime is 1521481873. The reversal of 1521481853 is 3581841251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1433909689 + 87572164 = 37867^2 + 9358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521481853 - 2⁸ = 1521481597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521481823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760740926 + 760740927.

It is an arithmetic number, because the mean of its divisors is an integer number (760740927).

Almost surely, 2^1521481853 is an apocalyptic number.

It is an amenable number.

1521481853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521481853 is an equidigital number, since it uses as much as digits as its factorization.

1521481853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 38.

The square root of 1521481853 is about 39006.1771133753. The cubic root of 1521481853 is about 1150.1529356782.

The spelling of 1521481853 in words is "one billion, five hundred twenty-one million, four hundred eighty-one thousand, eight hundred fifty-three".