51446140 has 12 divisors (see below), whose sum is σ = 108036936. Its totient is φ = 20578448.

The previous prime is 51446137. The next prime is 51446149. The reversal of 51446140 is 4164415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51446149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286134 + ... + 1286173.

It is an arithmetic number, because the mean of its divisors is an integer number (9003078).

Almost surely, 2^51446140 is an apocalyptic number.

It is an amenable number.

51446140 is an abundant number, since it is smaller than the sum of its proper divisors (56590796).

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

51446140 is a wasteful number, since it uses less digits than its factorization.

51446140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572316 (or 2572314 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 51446140 is about 7172.5964615333. The cubic root of 51446140 is about 371.9211977067.

The spelling of 51446140 in words is "fifty-one million, four hundred forty-six thousand, one hundred forty".