51430278 has 16 divisors (see below), whose sum is σ = 103602240. Its totient is φ = 17019816.

The previous prime is 51430261. The next prime is 51430289. The reversal of 51430278 is 87203415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30000 + ... + 31667.

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

Almost surely, 2^51430278 is an apocalyptic number.

51430278 is an abundant number, since it is smaller than the sum of its proper divisors (52171962).

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

51430278 is a wasteful number, since it uses less digits than its factorization.

51430278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61811.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 51430278 is about 7171.4906400274. The cubic root of 51430278 is about 371.8829698925.

The spelling of 51430278 in words is "fifty-one million, four hundred thirty thousand, two hundred seventy-eight".