51320838 has 16 divisors (see below), whose sum is σ = 103602240. Its totient is φ = 16946856.

The previous prime is 51320837. The next prime is 51320839. The reversal of 51320838 is 83802315.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51320837) and next prime (51320839).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51320837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39328 + ... + 40611.

It is an arithmetic number, because the mean of its divisors is an integer number (6475140).

Almost surely, 2^51320838 is an apocalyptic number.

51320838 is an abundant number, since it is smaller than the sum of its proper divisors (52281402).

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

51320838 is a wasteful number, since it uses less digits than its factorization.

51320838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80051.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 51320838 is about 7163.8563637192. The cubic root of 51320838 is about 371.6190023356.

The spelling of 51320838 in words is "fifty-one million, three hundred twenty thousand, eight hundred thirty-eight".