1925835221 has 2 divisors, whose sum is σ = 1925835222. Its totient is φ = 1925835220.

The previous prime is 1925835211. The next prime is 1925835229. The reversal of 1925835221 is 1225385291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1455422500 + 470412721 = 38150^2 + 21689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1925835221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1925835229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962917610 + 962917611.

It is an arithmetic number, because the mean of its divisors is an integer number (962917611).

Almost surely, 2^1925835221 is an apocalyptic number.

It is an amenable number.

1925835221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925835221 is an equidigital number, since it uses as much as digits as its factorization.

1925835221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The square root of 1925835221 is about 43884.3391314031. The cubic root of 1925835221 is about 1244.1508531560.

The spelling of 1925835221 in words is "one billion, nine hundred twenty-five million, eight hundred thirty-five thousand, two hundred twenty-one".