51623161 has 8 divisors (see below), whose sum is σ = 53483400. Its totient is φ = 49768320.

The previous prime is 51623149. The next prime is 51623179. The reversal of 51623161 is 16132615.

It can be written as a sum of positive squares in 4 ways, for example, as 14107536 + 37515625 = 3756^2 + 6125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51623161 - 2⁵ = 51623129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51623861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36691 + ... + 38071.

It is an arithmetic number, because the mean of its divisors is an integer number (6685425).

Almost surely, 2^51623161 is an apocalyptic number.

It is an amenable number.

51623161 is a deficient number, since it is larger than the sum of its proper divisors (1860239).

51623161 is a wasteful number, since it uses less digits than its factorization.

51623161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699.

The product of its digits is 1080, while the sum is 25.

The square root of 51623161 is about 7184.9259564730. The cubic root of 51623161 is about 372.3472905263.

Adding to 51623161 its reverse (16132615), we get a palindrome (67755776).

The spelling of 51623161 in words is "fifty-one million, six hundred twenty-three thousand, one hundred sixty-one".