51874340 has 72 divisors (see below), whose sum is σ = 129773952. Its totient is φ = 17357760.

The previous prime is 51874337. The next prime is 51874343. The reversal of 51874340 is 4347815.

It is an interprime number because it is at equal distance from previous prime (51874337) and next prime (51874343).

It is a junction number, because it is equal to n+sod(n) for n = 51874297 and 51874306.

It is not an unprimeable number, because it can be changed into a prime (51874343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41525 + ... + 42755.

It is an arithmetic number, because the mean of its divisors is an integer number (1802416).

Almost surely, 2^51874340 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 51874340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64886976).

51874340 is an abundant number, since it is smaller than the sum of its proper divisors (77899612).

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

51874340 is a wasteful number, since it uses less digits than its factorization.

51874340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 51874340 is about 7202.3843274294. The cubic root of 51874340 is about 372.9502146128.

The spelling of 51874340 in words is "fifty-one million, eight hundred seventy-four thousand, three hundred forty".