1905235201 has 3 divisors (see below), whose sum is σ = 1905278851. Its totient is φ = 1905191552.

The previous prime is 1905235177. The next prime is 1905235207. The reversal of 1905235201 is 1025325091.

The square root of 1905235201 is 43649.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1025325091 = 7 ⋅146475013.

It can be written as a sum of positive squares in only one way, i.e., 951660801 + 953574400 = 30849^2 + 30880^2 .

It is not a de Polignac number, because 1905235201 - 2⁹ = 1905234689 is a prime.

It is a super-2 number, since 2×1905235201² = 7259842342259020802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1905235201.

It is not an unprimeable number, because it can be changed into a prime (1905235207) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 21825 + ... + 65473.

Almost surely, 2^1905235201 is an apocalyptic number.

1905235201 is the 43649-th square number.

1905235201 is the 21825-th centered octagonal number.

It is an amenable number.

1905235201 is a deficient number, since it is larger than the sum of its proper divisors (43650).

1905235201 is an frugal number, since it uses more digits than its factorization.

1905235201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87298 (or 43649 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The cubic root of 1905235201 is about 1239.6988518166.

The spelling of 1905235201 in words is "one billion, nine hundred five million, two hundred thirty-five thousand, two hundred one".