51161612 has 12 divisors (see below), whose sum is σ = 90759816. Its totient is φ = 25230240.

The previous prime is 51161611. The next prime is 51161647. The reversal of 51161612 is 21616115.

It is not an unprimeable number, because it can be changed into a prime (51161611) 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, 87314 + ... + 87897.

It is an arithmetic number, because the mean of its divisors is an integer number (7563318).

Almost surely, 2^51161612 is an apocalyptic number.

It is an amenable number.

51161612 is a deficient number, since it is larger than the sum of its proper divisors (39598204).

51161612 is a wasteful number, since it uses less digits than its factorization.

51161612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175288 (or 175286 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 51161612 is about 7152.7345819623. The cubic root of 51161612 is about 371.2342807192.

Adding to 51161612 its reverse (21616115), we get a palindrome (72777727).

The spelling of 51161612 in words is "fifty-one million, one hundred sixty-one thousand, six hundred twelve".