51672040 has 64 divisors (see below), whose sum is σ = 137180160. Its totient is φ = 17141760.

The previous prime is 51672031. The next prime is 51672041. The reversal of 51672040 is 4027615.

51672040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51671996 and 51672014.

It is not an unprimeable number, because it can be changed into a prime (51672041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5704 + ... + 11656.

It is an arithmetic number, because the mean of its divisors is an integer number (2143440).

Almost surely, 2^51672040 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 51672040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68590080).

51672040 is an abundant number, since it is smaller than the sum of its proper divisors (85508120).

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

51672040 is a wasteful number, since it uses less digits than its factorization.

51672040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002 (or 5998 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 51672040 is about 7188.3266481150. The cubic root of 51672040 is about 372.4647715284.

Adding to 51672040 its reverse (4027615), we get a palindrome (55699655).

The spelling of 51672040 in words is "fifty-one million, six hundred seventy-two thousand, forty".