245990133 has 6 divisors (see below), whose sum is σ = 355319094. Its totient is φ = 163993416.

The previous prime is 245990113. The next prime is 245990137. The reversal of 245990133 is 331099542.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 205119684 + 40870449 = 14322^2 + 6393^2 .

It is not a de Polignac number, because 245990133 - 2⁹ = 245989621 is a prime.

It is a super-2 number, since 2×245990133² = 121022291066715378, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245990137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13666110 + ... + 13666127.

It is an arithmetic number, because the mean of its divisors is an integer number (59219849).

Almost surely, 2^245990133 is an apocalyptic number.

It is an amenable number.

245990133 is a deficient number, since it is larger than the sum of its proper divisors (109328961).

245990133 is a wasteful number, since it uses less digits than its factorization.

245990133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27332243 (or 27332240 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 245990133 is about 15684.0725897326. The cubic root of 245990133 is about 626.5742781347.

The spelling of 245990133 in words is "two hundred forty-five million, nine hundred ninety thousand, one hundred thirty-three".