51667040 has 24 divisors (see below), whose sum is σ = 122063760. Its totient is φ = 20666752.

The previous prime is 51667019. The next prime is 51667043. The reversal of 51667040 is 4076615.

It is a junction number, because it is equal to n+sod(n) for n = 51666994 and 51667012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51667043) 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, 161300 + ... + 161619.

It is an arithmetic number, because the mean of its divisors is an integer number (5085990).

Almost surely, 2^51667040 is an apocalyptic number.

It is an amenable number.

51667040 is an abundant number, since it is smaller than the sum of its proper divisors (70396720).

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

51667040 is a wasteful number, since it uses less digits than its factorization.

51667040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322934 (or 322926 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 51667040 is about 7187.9788536139. The cubic root of 51667040 is about 372.4527573977.

The spelling of 51667040 in words is "fifty-one million, six hundred sixty-seven thousand, forty".