51133120 has 28 divisors (see below), whose sum is σ = 121761504. Its totient is φ = 20453120.

The previous prime is 51133111. The next prime is 51133171. The reversal of 51133120 is 2133115.

It is a super-4 number, since 4×51133120⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 51133094 and 51133103.

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, 79576 + ... + 80215.

Almost surely, 2^51133120 is an apocalyptic number.

It is an amenable number.

51133120 is an abundant number, since it is smaller than the sum of its proper divisors (70628384).

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

51133120 is a wasteful number, since it uses less digits than its factorization.

51133120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159808 (or 159798 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 51133120 is about 7150.7426187774. The cubic root of 51133120 is about 371.1653542278.

Adding to 51133120 its reverse (2133115), we get a palindrome (53266235).

The spelling of 51133120 in words is "fifty-one million, one hundred thirty-three thousand, one hundred twenty".