202540251 has 8 divisors (see below), whose sum is σ = 271051264. Its totient is φ = 134528040.

The previous prime is 202540213. The next prime is 202540259. The reversal of 202540251 is 152045202.

It is a happy number.

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

It is not a de Polignac number, because 202540251 - 2⁶ = 202540187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202540259) 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, 123751 + ... + 125376.

It is an arithmetic number, because the mean of its divisors is an integer number (33881408).

Almost surely, 2^202540251 is an apocalyptic number.

202540251 is a deficient number, since it is larger than the sum of its proper divisors (68511013).

202540251 is a wasteful number, since it uses less digits than its factorization.

202540251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249401.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 202540251 is about 14231.6636764645. The cubic root of 202540251 is about 587.2690515822.

Adding to 202540251 its reverse (152045202), we get a palindrome (354585453).

The spelling of 202540251 in words is "two hundred two million, five hundred forty thousand, two hundred fifty-one".