51263493 has 8 divisors (see below), whose sum is σ = 68392128. Its totient is φ = 34155264.

The previous prime is 51263479. The next prime is 51263519. The reversal of 51263493 is 39436215.

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

It is not a de Polignac number, because 51263493 - 2⁴ = 51263477 is a prime.

It is a super-2 number, since 2×51263493² = 5255891429122098, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51263413) 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, 2296 + ... + 10382.

It is an arithmetic number, because the mean of its divisors is an integer number (8549016).

Almost surely, 2^51263493 is an apocalyptic number.

It is an amenable number.

51263493 is a deficient number, since it is larger than the sum of its proper divisors (17128635).

51263493 is a wasteful number, since it uses less digits than its factorization.

51263493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203.

The product of its digits is 19440, while the sum is 33.

The square root of 51263493 is about 7159.8528616166. The cubic root of 51263493 is about 371.4805372418.

The spelling of 51263493 in words is "fifty-one million, two hundred sixty-three thousand, four hundred ninety-three".