6525338921 has 2 divisors, whose sum is σ = 6525338922. Its totient is φ = 6525338920.

The previous prime is 6525338861. The next prime is 6525338951. The reversal of 6525338921 is 1298335256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5267856400 + 1257482521 = 72580^2 + 35461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6525338921 is a prime.

It is not a weakly prime, because it can be changed into another prime (6525338951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3262669460 + 3262669461.

It is an arithmetic number, because the mean of its divisors is an integer number (3262669461).

Almost surely, 2^6525338921 is an apocalyptic number.

It is an amenable number.

6525338921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6525338921 is an equidigital number, since it uses as much as digits as its factorization.

6525338921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 6525338921 is about 80779.5699481001. The cubic root of 6525338921 is about 1868.6775059315.

The spelling of 6525338921 in words is "six billion, five hundred twenty-five million, three hundred thirty-eight thousand, nine hundred twenty-one".