199311025 has 12 divisors (see below), whose sum is σ = 248953932. Its totient is φ = 158282240.

The previous prime is 199311023. The next prime is 199311053. The reversal of 199311025 is 520113991.

199311025 = 1972² + 1973² + ... + 2021².

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1852321 + 197458704 = 1361^2 + 14052^2 .

It is not a de Polignac number, because 199311025 - 2¹ = 199311023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199311023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25672 + ... + 32521.

It is an arithmetic number, because the mean of its divisors is an integer number (20746161).

Almost surely, 2^199311025 is an apocalyptic number.

It is an amenable number.

199311025 is a deficient number, since it is larger than the sum of its proper divisors (49642907).

199311025 is a wasteful number, since it uses less digits than its factorization.

199311025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58340 (or 58335 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 199311025 is about 14117.7556644107. The cubic root of 199311025 is about 584.1312500164.

The spelling of 199311025 in words is "one hundred ninety-nine million, three hundred eleven thousand, twenty-five".