240025251 has 4 divisors (see below), whose sum is σ = 320033672. Its totient is φ = 160016832.

The previous prime is 240025249. The next prime is 240025267. The reversal of 240025251 is 152520042.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 240025251 - 2¹ = 240025249 is a prime.

It is a super-2 number, since 2×240025251² = 115224242235226002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240025451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40004206 + ... + 40004211.

It is an arithmetic number, because the mean of its divisors is an integer number (80008418).

Almost surely, 2^240025251 is an apocalyptic number.

240025251 is a deficient number, since it is larger than the sum of its proper divisors (80008421).

240025251 is an equidigital number, since it uses as much as digits as its factorization.

240025251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80008420.

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

The square root of 240025251 is about 15492.7483359151. The cubic root of 240025251 is about 621.4682950731.

Adding to 240025251 its reverse (152520042), we get a palindrome (392545293).

The spelling of 240025251 in words is "two hundred forty million, twenty-five thousand, two hundred fifty-one".