51436349 has 4 divisors (see below), whose sum is σ = 53672736. Its totient is φ = 49199964.

The previous prime is 51436331. The next prime is 51436387. The reversal of 51436349 is 94363415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51436349 - 2²⁰ = 50387773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51436309) 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, 1118159 + ... + 1118204.

It is an arithmetic number, because the mean of its divisors is an integer number (13418184).

Almost surely, 2^51436349 is an apocalyptic number.

It is an amenable number.

51436349 is a deficient number, since it is larger than the sum of its proper divisors (2236387).

51436349 is a wasteful number, since it uses less digits than its factorization.

51436349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236386.

The product of its digits is 38880, while the sum is 35.

The square root of 51436349 is about 7171.9139007660. The cubic root of 51436349 is about 371.8976020817.

It can be divided in two parts, 514 and 36349, that added together give a palindrome (36863).

The spelling of 51436349 in words is "fifty-one million, four hundred thirty-six thousand, three hundred forty-nine".