51404451 has 8 divisors (see below), whose sum is σ = 78330624. Its totient is φ = 29373960.

The previous prime is 51404429. The next prime is 51404459. The reversal of 51404451 is 15440415.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-51404451 is a prime.

It is a super-2 number, since 2×51404451² = 5284835165222802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51404459) 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, 1223895 + ... + 1223936.

It is an arithmetic number, because the mean of its divisors is an integer number (9791328).

Almost surely, 2^51404451 is an apocalyptic number.

51404451 is a deficient number, since it is larger than the sum of its proper divisors (26926173).

51404451 is a wasteful number, since it uses less digits than its factorization.

51404451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447841.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 51404451 is about 7169.6897422413. The cubic root of 51404451 is about 371.8207093590.

Adding to 51404451 its reverse (15440415), we get a palindrome (66844866).

It can be divided in two parts, 5140 and 4451, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 51404451 in words is "fifty-one million, four hundred four thousand, four hundred fifty-one".