51616233 has 12 divisors (see below), whose sum is σ = 78942708. Its totient is φ = 32386560.

The previous prime is 51616189. The next prime is 51616237. The reversal of 51616233 is 33261615.

It can be written as a sum of positive squares in 2 ways, for example, as 47155689 + 4460544 = 6867^2 + 2112^2 .

It is not a de Polignac number, because 51616233 - 2²¹ = 49519081 is a prime.

It is a super-2 number, since 2×51616233² = 5328471018220578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51616197 and 51616206.

It is not an unprimeable number, because it can be changed into a prime (51616237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168528 + ... + 168833.

It is an arithmetic number, because the mean of its divisors is an integer number (6578559).

Almost surely, 2^51616233 is an apocalyptic number.

It is an amenable number.

51616233 is a deficient number, since it is larger than the sum of its proper divisors (27326475).

51616233 is a wasteful number, since it uses less digits than its factorization.

51616233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337384 (or 337381 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 51616233 is about 7184.4438198096. The cubic root of 51616233 is about 372.3306330326.

Adding to 51616233 its reverse (33261615), we get a palindrome (84877848).

The spelling of 51616233 in words is "fifty-one million, six hundred sixteen thousand, two hundred thirty-three".