51545454 has 8 divisors (see below), whose sum is σ = 103090920. Its totient is φ = 17181816.

The previous prime is 51545449. The next prime is 51545471. The reversal of 51545454 is 45454515.

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

51545454 is an admirable number.

It is a super-2 number, since 2×51545454² = 5313867656132232, which contains 22 as substring.

51545454 is a modest number, since divided by 5454 gives 5154 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4295449 + ... + 4295460.

It is an arithmetic number, because the mean of its divisors is an integer number (12886365).

Almost surely, 2^51545454 is an apocalyptic number.

51545454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51545454 is a wasteful number, since it uses less digits than its factorization.

51545454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8590914.

The product of its digits is 40000, while the sum is 33.

The square root of 51545454 is about 7179.5162789703. The cubic root of 51545454 is about 372.1603684784.

Adding to 51545454 its reverse (45454515), we get a palindrome (96999969).

The spelling of 51545454 in words is "fifty-one million, five hundred forty-five thousand, four hundred fifty-four".