51420974 has 8 divisors (see below), whose sum is σ = 84143448. Its totient is φ = 23373160.

The previous prime is 51420923. The next prime is 51420979. The reversal of 51420974 is 47902415.

It is a happy number.

51420974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51420974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51420979) 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 3 ways as a sum of consecutive naturals, for example, 1168637 + ... + 1168680.

It is an arithmetic number, because the mean of its divisors is an integer number (10517931).

Almost surely, 2^51420974 is an apocalyptic number.

51420974 is a deficient number, since it is larger than the sum of its proper divisors (32722474).

51420974 is a wasteful number, since it uses less digits than its factorization.

51420974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337330.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51420974 is about 7170.8419310427. The cubic root of 51420974 is about 371.8605433638.

The spelling of 51420974 in words is "fifty-one million, four hundred twenty thousand, nine hundred seventy-four".