251042036 has 24 divisors (see below), whose sum is σ = 508966080. Its totient is φ = 106114752.

The previous prime is 251042021. The next prime is 251042039. The reversal of 251042036 is 630240152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251042039) 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 7 ways as a sum of consecutive naturals, for example, 59366 + ... + 63453.

It is an arithmetic number, because the mean of its divisors is an integer number (21206920).

Almost surely, 2^251042036 is an apocalyptic number.

It is an amenable number.

251042036 is an abundant number, since it is smaller than the sum of its proper divisors (257924044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251042036 is a wasteful number, since it uses less digits than its factorization.

251042036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122903 (or 122901 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 251042036 is about 15844.3061066113. The cubic root of 251042036 is about 630.8345670862.

Adding to 251042036 its reverse (630240152), we get a palindrome (881282188).

The spelling of 251042036 in words is "two hundred fifty-one million, forty-two thousand, thirty-six".