51439774 has 8 divisors (see below), whose sum is σ = 77227920. Its totient is φ = 25697136.

The previous prime is 51439771. The next prime is 51439781. The reversal of 51439774 is 47793415.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51439771) 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, 8394 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (9653490).

Almost surely, 2^51439774 is an apocalyptic number.

51439774 is a deficient number, since it is larger than the sum of its proper divisors (25788146).

51439774 is a wasteful number, since it uses less digits than its factorization.

51439774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22754.

The product of its digits is 105840, while the sum is 40.

The square root of 51439774 is about 7172.1526754525. The cubic root of 51439774 is about 371.9058564326.

The spelling of 51439774 in words is "fifty-one million, four hundred thirty-nine thousand, seven hundred seventy-four".