51707040 has 192 divisors, whose sum is σ = 203212800. Its totient is φ = 10736640.

The previous prime is 51707021. The next prime is 51707053. The reversal of 51707040 is 4070715.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51707040.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36261 + ... + 37659.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^51707040 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 51707040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101606400).

51707040 is an abundant number, since it is smaller than the sum of its proper divisors (151505760).

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

51707040 is a wasteful number, since it uses less digits than its factorization.

51707040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1427 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 51707040 is about 7190.7607386145. The cubic root of 51707040 is about 372.5488487505.

Adding to 51707040 its reverse (4070715), we get a palindrome (55777755).

The spelling of 51707040 in words is "fifty-one million, seven hundred seven thousand, forty".