51562361 has 4 divisors (see below), whose sum is σ = 51578724. Its totient is φ = 51546000.

The previous prime is 51562321. The next prime is 51562367. The reversal of 51562361 is 16326515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51036736 + 525625 = 7144^2 + 725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51562361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51562367) 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, 1790 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (12894681).

Almost surely, 2^51562361 is an apocalyptic number.

It is an amenable number.

51562361 is a deficient number, since it is larger than the sum of its proper divisors (16363).

51562361 is a wasteful number, since it uses less digits than its factorization.

51562361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16362.

The product of its digits is 5400, while the sum is 29.

The square root of 51562361 is about 7180.6936294483. The cubic root of 51562361 is about 372.2010537833.

Adding to 51562361 its reverse (16326515), we get a palindrome (67888876).

The spelling of 51562361 in words is "fifty-one million, five hundred sixty-two thousand, three hundred sixty-one".