51120451 has 4 divisors (see below), whose sum is σ = 51161400. Its totient is φ = 51079504.

The previous prime is 51120437. The next prime is 51120463. The reversal of 51120451 is 15402115.

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

It is a cyclic number.

It is not a de Polignac number, because 51120451 - 2⁷ = 51120323 is a prime.

It is a super-2 number, since 2×51120451² = 5226601020886802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51120551) 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, 18541 + ... + 21118.

It is an arithmetic number, because the mean of its divisors is an integer number (12790350).

Almost surely, 2^51120451 is an apocalyptic number.

51120451 is a deficient number, since it is larger than the sum of its proper divisors (40949).

51120451 is a wasteful number, since it uses less digits than its factorization.

51120451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40948.

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

The square root of 51120451 is about 7149.8567118509. The cubic root of 51120451 is about 371.1346977617.

Adding to 51120451 its reverse (15402115), we get a palindrome (66522566).

The spelling of 51120451 in words is "fifty-one million, one hundred twenty thousand, four hundred fifty-one".