51242463 has 10 divisors (see below), whose sum is σ = 76547504. Its totient is φ = 34161588.

The previous prime is 51242431. The next prime is 51242479. The reversal of 51242463 is 36424215.

It is not a de Polignac number, because 51242463 - 2⁵ = 51242431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 316231 + ... + 316392.

Almost surely, 2^51242463 is an apocalyptic number.

51242463 is a deficient number, since it is larger than the sum of its proper divisors (25305041).

51242463 is an equidigital number, since it uses as much as digits as its factorization.

51242463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632635 (or 632626 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 51242463 is about 7158.3841053690. The cubic root of 51242463 is about 371.4297323787.

Adding to 51242463 its reverse (36424215), we get a palindrome (87666678).

The spelling of 51242463 in words is "fifty-one million, two hundred forty-two thousand, four hundred sixty-three".