251242201 has 16 divisors (see below), whose sum is σ = 304922880. Its totient is φ = 202083840.

The previous prime is 251242183. The next prime is 251242217. The reversal of 251242201 is 102242152.

It is not a de Polignac number, because 251242201 - 2⁹ = 251241689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251242261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39781 + ... + 45661.

It is an arithmetic number, because the mean of its divisors is an integer number (19057680).

Almost surely, 2^251242201 is an apocalyptic number.

It is an amenable number.

251242201 is a deficient number, since it is larger than the sum of its proper divisors (53680679).

251242201 is a wasteful number, since it uses less digits than its factorization.

251242201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6264.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 251242201 is about 15850.6214704661. The cubic root of 251242201 is about 631.0021850382.

Adding to 251242201 its reverse (102242152), we get a palindrome (353484353).

The spelling of 251242201 in words is "two hundred fifty-one million, two hundred forty-two thousand, two hundred one".