51740520 has 128 divisors (see below), whose sum is σ = 177085440. Its totient is φ = 11980800.

The previous prime is 51740509. The next prime is 51740527. The reversal of 51740520 is 2504715.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (51740527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25545 + ... + 27495.

It is an arithmetic number, because the mean of its divisors is an integer number (1383480).

Almost surely, 2^51740520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51740520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88542720).

51740520 is an abundant number, since it is smaller than the sum of its proper divisors (125344920).

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

51740520 is a wasteful number, since it uses less digits than its factorization.

51740520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 51740520 is about 7193.0883492419. The cubic root of 51740520 is about 372.6292391214.

The spelling of 51740520 in words is "fifty-one million, seven hundred forty thousand, five hundred twenty".