51507406 has 4 divisors (see below), whose sum is σ = 77261112. Its totient is φ = 25753702.

The previous prime is 51507403. The next prime is 51507427. The reversal of 51507406 is 60470515.

51507406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51507403) 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 as a sum of consecutive naturals, namely, 12876850 + ... + 12876853.

It is an arithmetic number, because the mean of its divisors is an integer number (19315278).

Almost surely, 2^51507406 is an apocalyptic number.

51507406 is a deficient number, since it is larger than the sum of its proper divisors (25753706).

51507406 is a wasteful number, since it uses less digits than its factorization.

51507406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25753705.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 51507406 is about 7176.8660291244. The cubic root of 51507406 is about 372.0687765463.

The spelling of 51507406 in words is "fifty-one million, five hundred seven thousand, four hundred six".