51102451 has 4 divisors (see below), whose sum is σ = 51580152. Its totient is φ = 50624752.

The previous prime is 51102433. The next prime is 51102473. The reversal of 51102451 is 15420115.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51102451 is a prime.

It is a super-2 number, since 2×51102451² = 5222920996414802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51102431) 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, 238690 + ... + 238903.

It is an arithmetic number, because the mean of its divisors is an integer number (12895038).

Almost surely, 2^51102451 is an apocalyptic number.

51102451 is a deficient number, since it is larger than the sum of its proper divisors (477701).

51102451 is a wasteful number, since it uses less digits than its factorization.

51102451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477700.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 51102451 is about 7148.5978345407. The cubic root of 51102451 is about 371.0911326218.

Adding to 51102451 its reverse (15420115), we get a palindrome (66522566).

The spelling of 51102451 in words is "fifty-one million, one hundred two thousand, four hundred fifty-one".