51940012 has 6 divisors (see below), whose sum is σ = 90895028. Its totient is φ = 25970004.

The previous prime is 51939961. The next prime is 51940013. The reversal of 51940012 is 21004915.

It is not an unprimeable number, because it can be changed into a prime (51940013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6492498 + ... + 6492505.

Almost surely, 2^51940012 is an apocalyptic number.

It is an amenable number.

51940012 is a deficient number, since it is larger than the sum of its proper divisors (38955016).

51940012 is a wasteful number, since it uses less digits than its factorization.

51940012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12985007 (or 12985005 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51940012 is about 7206.9419312216. The cubic root of 51940012 is about 373.1075310440.

Adding to 51940012 its reverse (21004915), we get a palindrome (72944927).

The spelling of 51940012 in words is "fifty-one million, nine hundred forty thousand, twelve".