51389774 has 8 divisors (see below), whose sum is σ = 80436240. Its totient is φ = 24577696.

The previous prime is 51389771. The next prime is 51389777. The reversal of 51389774 is 47798315.

It is an interprime number because it is at equal distance from previous prime (51389771) and next prime (51389777).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51389771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558539 + ... + 558630.

It is an arithmetic number, because the mean of its divisors is an integer number (10054530).

Almost surely, 2^51389774 is an apocalyptic number.

51389774 is a deficient number, since it is larger than the sum of its proper divisors (29046466).

51389774 is a wasteful number, since it uses less digits than its factorization.

51389774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117194.

The product of its digits is 211680, while the sum is 44.

The square root of 51389774 is about 7168.6661241824. Note that the first 3 decimals coincide. The cubic root of 51389774 is about 371.7853185714.

The spelling of 51389774 in words is "fifty-one million, three hundred eighty-nine thousand, seven hundred seventy-four".