51165740 has 12 divisors (see below), whose sum is σ = 107448096. Its totient is φ = 20466288.

The previous prime is 51165739. The next prime is 51165749. The reversal of 51165740 is 4756115.

It is not an unprimeable number, because it can be changed into a prime (51165749) 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, 1279124 + ... + 1279163.

It is an arithmetic number, because the mean of its divisors is an integer number (8954008).

Almost surely, 2^51165740 is an apocalyptic number.

It is an amenable number.

51165740 is an abundant number, since it is smaller than the sum of its proper divisors (56282356).

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

51165740 is a wasteful number, since it uses less digits than its factorization.

51165740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558296 (or 2558294 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 51165740 is about 7153.0231371078. The cubic root of 51165740 is about 371.2442648579.

The spelling of 51165740 in words is "fifty-one million, one hundred sixty-five thousand, seven hundred forty".