51145413 has 16 divisors (see below), whose sum is σ = 74967552. Its totient is φ = 30758000.

The previous prime is 51145403. The next prime is 51145417. The reversal of 51145413 is 31454115.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51145413 - 2⁶ = 51145349 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1593 + ... + 10238.

It is an arithmetic number, because the mean of its divisors is an integer number (4685472).

Almost surely, 2^51145413 is an apocalyptic number.

It is an amenable number.

51145413 is a deficient number, since it is larger than the sum of its proper divisors (23822139).

51145413 is a wasteful number, since it uses less digits than its factorization.

51145413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11976.

The product of its digits is 1200, while the sum is 24.

The square root of 51145413 is about 7151.6021281948. The cubic root of 51145413 is about 371.1950960084.

Adding to 51145413 its reverse (31454115), we get a palindrome (82599528).

The spelling of 51145413 in words is "fifty-one million, one hundred forty-five thousand, four hundred thirteen".