51911142 has 8 divisors (see below), whose sum is σ = 103822296. Its totient is φ = 17303712.

The previous prime is 51911129. The next prime is 51911213. The reversal of 51911142 is 24111915.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

51911142 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4325923 + ... + 4325934.

It is an arithmetic number, because the mean of its divisors is an integer number (12977787).

Almost surely, 2^51911142 is an apocalyptic number.

51911142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51911142 is a wasteful number, since it uses less digits than its factorization.

51911142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8651862.

The product of its digits is 360, while the sum is 24.

The square root of 51911142 is about 7204.9387228484. The cubic root of 51911142 is about 373.0383896738.

The spelling of 51911142 in words is "fifty-one million, nine hundred eleven thousand, one hundred forty-two".