51009252 has 24 divisors (see below), whose sum is σ = 136024896. Its totient is φ = 14574048.

The previous prime is 51009251. The next prime is 51009263. The reversal of 51009252 is 25290015.

It is not an unprimeable number, because it can be changed into a prime (51009251) 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, 303543 + ... + 303710.

It is an arithmetic number, because the mean of its divisors is an integer number (5667704).

Almost surely, 2^51009252 is an apocalyptic number.

It is an amenable number.

51009252 is an abundant number, since it is smaller than the sum of its proper divisors (85015644).

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

51009252 is a wasteful number, since it uses less digits than its factorization.

51009252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607267 (or 607265 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 51009252 is about 7142.0761687341. The cubic root of 51009252 is about 370.8654006637.

Adding to 51009252 its reverse (25290015), we get a palindrome (76299267).

The spelling of 51009252 in words is "fifty-one million, nine thousand, two hundred fifty-two".