51451415 has 4 divisors (see below), whose sum is σ = 61741704. Its totient is φ = 41161128.

The previous prime is 51451409. The next prime is 51451427. The reversal of 51451415 is 51415415.

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 51451415 - 2⁸ = 51451159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5145137 + ... + 5145146.

It is an arithmetic number, because the mean of its divisors is an integer number (15435426).

Almost surely, 2^51451415 is an apocalyptic number.

51451415 is a deficient number, since it is larger than the sum of its proper divisors (10290289).

51451415 is a wasteful number, since it uses less digits than its factorization.

51451415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10290288.

The product of its digits is 2000, while the sum is 26.

The square root of 51451415 is about 7172.9641711081. The cubic root of 51451415 is about 371.9339088468.

The spelling of 51451415 in words is "fifty-one million, four hundred fifty-one thousand, four hundred fifteen".