51545441 has 8 divisors (see below), whose sum is σ = 53423400. Its totient is φ = 49674240.

The previous prime is 51545437. The next prime is 51545443. The reversal of 51545441 is 14454515.

It can be written as a sum of positive squares in 4 ways, for example, as 3534400 + 48011041 = 1880^2 + 6929^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51545441 - 2² = 51545437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51545443) 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, 17825 + ... + 20513.

It is an arithmetic number, because the mean of its divisors is an integer number (6677925).

Almost surely, 2^51545441 is an apocalyptic number.

It is an amenable number.

51545441 is a deficient number, since it is larger than the sum of its proper divisors (1877959).

51545441 is a wasteful number, since it uses less digits than its factorization.

51545441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379.

The product of its digits is 8000, while the sum is 29.

The square root of 51545441 is about 7179.5153736168. The cubic root of 51545441 is about 372.1603371915.

Adding to 51545441 its reverse (14454515), we get a palindrome (65999956).

The spelling of 51545441 in words is "fifty-one million, five hundred forty-five thousand, four hundred forty-one".