51734391 has 4 divisors (see below), whose sum is σ = 68979192. Its totient is φ = 34489592.

The previous prime is 51734387. The next prime is 51734411. The reversal of 51734391 is 19343715.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51734391 - 2² = 51734387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51734311) 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, 8622396 + ... + 8622401.

It is an arithmetic number, because the mean of its divisors is an integer number (17244798).

Almost surely, 2^51734391 is an apocalyptic number.

51734391 is a deficient number, since it is larger than the sum of its proper divisors (17244801).

51734391 is a wasteful number, since it uses less digits than its factorization.

51734391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17244800.

The product of its digits is 11340, while the sum is 33.

The square root of 51734391 is about 7192.6623026526. The cubic root of 51734391 is about 372.6145250908.

It can be divided in two parts, 51734 and 391, that added together give a palindrome (52125).

The spelling of 51734391 in words is "fifty-one million, seven hundred thirty-four thousand, three hundred ninety-one".