51363231 has 4 divisors (see below), whose sum is σ = 68484312. Its totient is φ = 34242152.

The previous prime is 51363229. The next prime is 51363233. The reversal of 51363231 is 13236315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51363229) and next prime (51363233).

It is a cyclic number.

It is not a de Polignac number, because 51363231 - 2¹ = 51363229 is a prime.

It is a super-2 number, since 2×51363231² = 5276362997518722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51363233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8560536 + ... + 8560541.

It is an arithmetic number, because the mean of its divisors is an integer number (17121078).

Almost surely, 2^51363231 is an apocalyptic number.

51363231 is a deficient number, since it is larger than the sum of its proper divisors (17121081).

51363231 is a wasteful number, since it uses less digits than its factorization.

51363231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17121080.

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

The square root of 51363231 is about 7166.8145643654. The cubic root of 51363231 is about 371.7212980706.

Adding to 51363231 its reverse (13236315), we get a palindrome (64599546).

The spelling of 51363231 in words is "fifty-one million, three hundred sixty-three thousand, two hundred thirty-one".