51901212 has 24 divisors (see below), whose sum is σ = 132112512. Its totient is φ = 15727600.

The previous prime is 51901181. The next prime is 51901219. The reversal of 51901212 is 21210915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51901219) 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, 196464 + ... + 196727.

It is an arithmetic number, because the mean of its divisors is an integer number (5504688).

Almost surely, 2^51901212 is an apocalyptic number.

It is an amenable number.

51901212 is an abundant number, since it is smaller than the sum of its proper divisors (80211300).

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

51901212 is a wasteful number, since it uses less digits than its factorization.

51901212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393209 (or 393207 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 51901212 is about 7204.2495792414. The cubic root of 51901212 is about 373.0146021831.

The spelling of 51901212 in words is "fifty-one million, nine hundred one thousand, two hundred twelve".