51623133 has 16 divisors (see below), whose sum is σ = 72707520. Its totient is φ = 32489856.

The previous prime is 51623129. The next prime is 51623137. The reversal of 51623133 is 33132615.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51623129) and next prime (51623137).

It is not a de Polignac number, because 51623133 - 2² = 51623129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51623137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16641 + ... + 19497.

It is an arithmetic number, because the mean of its divisors is an integer number (4544220).

Almost surely, 2^51623133 is an apocalyptic number.

It is an amenable number.

51623133 is a deficient number, since it is larger than the sum of its proper divisors (21084387).

51623133 is a wasteful number, since it uses less digits than its factorization.

51623133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196.

The product of its digits is 1620, while the sum is 24.

The square root of 51623133 is about 7184.9240079489. The cubic root of 51623133 is about 372.3472232068.

Adding to 51623133 its reverse (33132615), we get a palindrome (84755748).

The spelling of 51623133 in words is "fifty-one million, six hundred twenty-three thousand, one hundred thirty-three".