51151617 has 24 divisors (see below), whose sum is σ = 80889120. Its totient is φ = 30890880.

The previous prime is 51151613. The next prime is 51151687. The reversal of 51151617 is 71615115.

It is a happy number.

It is not a de Polignac number, because 51151617 - 2² = 51151613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51151613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33609 + ... + 35097.

It is an arithmetic number, because the mean of its divisors is an integer number (3370380).

Almost surely, 2^51151617 is an apocalyptic number.

It is an amenable number.

51151617 is a deficient number, since it is larger than the sum of its proper divisors (29737503).

51151617 is a wasteful number, since it uses less digits than its factorization.

51151617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1850 counting only the distinct ones).

The product of its digits is 1050, while the sum is 27.

The square root of 51151617 is about 7152.0358640040. The cubic root of 51151617 is about 371.2101042051.

The spelling of 51151617 in words is "fifty-one million, one hundred fifty-one thousand, six hundred seventeen".