51061853 has 4 divisors (see below), whose sum is σ = 51404700. Its totient is φ = 50719008.

The previous prime is 51061847. The next prime is 51061859. The reversal of 51061853 is 35816015.

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

It is an interprime number because it is at equal distance from previous prime (51061847) and next prime (51061859).

It can be written as a sum of positive squares in 2 ways, for example, as 11648569 + 39413284 = 3413^2 + 6278^2 .

It is a cyclic number.

It is not a de Polignac number, because 51061853 - 2¹² = 51057757 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 (51061859) 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, 171200 + ... + 171497.

It is an arithmetic number, because the mean of its divisors is an integer number (12851175).

Almost surely, 2^51061853 is an apocalyptic number.

It is an amenable number.

51061853 is a deficient number, since it is larger than the sum of its proper divisors (342847).

51061853 is a wasteful number, since it uses less digits than its factorization.

51061853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342846.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 51061853 is about 7145.7576925054. The cubic root of 51061853 is about 370.9928362985.

Adding to 51061853 its reverse (35816015), we get a palindrome (86877868).

The spelling of 51061853 in words is "fifty-one million, sixty-one thousand, eight hundred fifty-three".