51420274 has 8 divisors (see below), whose sum is σ = 81667548. Its totient is φ = 24197760.

The previous prime is 51420247. The next prime is 51420287. The reversal of 51420274 is 47202415.

It can be written as a sum of positive squares in 2 ways, for example, as 46335249 + 5085025 = 6807^2 + 2255^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756147 + ... + 756214.

Almost surely, 2^51420274 is an apocalyptic number.

51420274 is a deficient number, since it is larger than the sum of its proper divisors (30247274).

51420274 is a wasteful number, since it uses less digits than its factorization.

51420274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512380.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 51420274 is about 7170.7931221030. The cubic root of 51420274 is about 371.8588559618.

Adding to 51420274 its reverse (47202415), we get a palindrome (98622689).

The spelling of 51420274 in words is "fifty-one million, four hundred twenty thousand, two hundred seventy-four".