201649253 has 8 divisors (see below), whose sum is σ = 217937496. Its totient is φ = 185472000.

The previous prime is 201649243. The next prime is 201649277. The reversal of 201649253 is 352946102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66049 + 201583204 = 257^2 + 14198^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201649253 is a prime.

It is a super-3 number, since 3×201649253³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201649243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23948 + ... + 31253.

It is an arithmetic number, because the mean of its divisors is an integer number (27242187).

Almost surely, 2^201649253 is an apocalyptic number.

It is an amenable number.

201649253 is a deficient number, since it is larger than the sum of its proper divisors (16288243).

201649253 is a wasteful number, since it uses less digits than its factorization.

201649253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55495.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 201649253 is about 14200.3258061215. The cubic root of 201649253 is about 586.4066308769.

The spelling of 201649253 in words is "two hundred one million, six hundred forty-nine thousand, two hundred fifty-three".