1900091225 has 6 divisors (see below), whose sum is σ = 2356113150. Its totient is φ = 1520072960.

The previous prime is 1900091213. The next prime is 1900091239. The reversal of 1900091225 is 5221900091.

It can be written as a sum of positive squares in 3 ways, for example, as 62425801 + 1837665424 = 7901^2 + 42868^2 .

It is not a de Polignac number, because 1900091225 - 2⁴ = 1900091209 is a prime.

It is a super-2 number, since 2×1900091225² = 7220693326644001250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38001800 + ... + 38001849.

It is an arithmetic number, because the mean of its divisors is an integer number (392685525).

Almost surely, 2^1900091225 is an apocalyptic number.

It is an amenable number.

1900091225 is a deficient number, since it is larger than the sum of its proper divisors (456021925).

1900091225 is an equidigital number, since it uses as much as digits as its factorization.

1900091225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76003659 (or 76003654 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 1900091225 is about 43590.0358453626. The cubic root of 1900091225 is about 1238.5821517425.

The spelling of 1900091225 in words is "one billion, nine hundred million, ninety-one thousand, two hundred twenty-five".