51434521 has 4 divisors (see below), whose sum is σ = 51617844. Its totient is φ = 51251200.

The previous prime is 51434491. The next prime is 51434597. The reversal of 51434521 is 12543415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12543415 = 5 ⋅2508683.

It can be written as a sum of positive squares in 2 ways, for example, as 37454400 + 13980121 = 6120^2 + 3739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51434521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51434821) 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, 91240 + ... + 91801.

It is an arithmetic number, because the mean of its divisors is an integer number (12904461).

Almost surely, 2^51434521 is an apocalyptic number.

It is an amenable number.

51434521 is a deficient number, since it is larger than the sum of its proper divisors (183323).

51434521 is a wasteful number, since it uses less digits than its factorization.

51434521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183322.

The product of its digits is 2400, while the sum is 25.

The square root of 51434521 is about 7171.7864580591. The cubic root of 51434521 is about 371.8931963979.

Adding to 51434521 its reverse (12543415), we get a palindrome (63977936).

The spelling of 51434521 in words is "fifty-one million, four hundred thirty-four thousand, five hundred twenty-one".