240722251 has 12 divisors (see below), whose sum is σ = 305481240. Its totient is φ = 187575360.

The previous prime is 240722233. The next prime is 240722257. The reversal of 240722251 is 152227042.

It is not a de Polignac number, because 240722251 - 2⁷ = 240722123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240722257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222766 + ... + 223843.

It is an arithmetic number, because the mean of its divisors is an integer number (25456770).

Almost surely, 2^240722251 is an apocalyptic number.

240722251 is a deficient number, since it is larger than the sum of its proper divisors (64758989).

240722251 is a wasteful number, since it uses less digits than its factorization.

240722251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446634 (or 446627 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 240722251 is about 15515.2264243871. The cubic root of 240722251 is about 622.0692662805.

Adding to 240722251 its reverse (152227042), we get a palindrome (392949293).

The spelling of 240722251 in words is "two hundred forty million, seven hundred twenty-two thousand, two hundred fifty-one".