51451495 has 12 divisors (see below), whose sum is σ = 62631576. Its totient is φ = 40576320.

The previous prime is 51451493. The next prime is 51451501. The reversal of 51451495 is 59415415.

It is a happy number.

It is not a de Polignac number, because 51451495 - 2¹ = 51451493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51451495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25680 + ... + 27610.

It is an arithmetic number, because the mean of its divisors is an integer number (5219298).

Almost surely, 2^51451495 is an apocalyptic number.

51451495 is a deficient number, since it is larger than the sum of its proper divisors (11180081).

51451495 is an equidigital number, since it uses as much as digits as its factorization.

51451495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082 (or 2009 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 51451495 is about 7172.9697476011. The cubic root of 51451495 is about 371.9341016157.

The spelling of 51451495 in words is "fifty-one million, four hundred fifty-one thousand, four hundred ninety-five".