51146428 has 24 divisors (see below), whose sum is σ = 91636272. Its totient is φ = 24971904.

The previous prime is 51146419. The next prime is 51146449. The reversal of 51146428 is 82464115.

It is a self number, because there is not a number n which added to its sum of digits gives 51146428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30426 + ... + 32062.

It is an arithmetic number, because the mean of its divisors is an integer number (3818178).

Almost surely, 2^51146428 is an apocalyptic number.

It is an amenable number.

51146428 is a deficient number, since it is larger than the sum of its proper divisors (40489844).

51146428 is a wasteful number, since it uses less digits than its factorization.

51146428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1819 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 51146428 is about 7151.6730909627. The cubic root of 51146428 is about 371.1975514943.

The spelling of 51146428 in words is "fifty-one million, one hundred forty-six thousand, four hundred twenty-eight".