51505141 has 4 divisors (see below), whose sum is σ = 51593472. Its totient is φ = 51416812.

The previous prime is 51505127. The next prime is 51505159. The reversal of 51505141 is 14150515.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51505141 - 2⁵ = 51505109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51575141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43285 + ... + 44458.

It is an arithmetic number, because the mean of its divisors is an integer number (12898368).

Almost surely, 2^51505141 is an apocalyptic number.

It is an amenable number.

51505141 is a deficient number, since it is larger than the sum of its proper divisors (88331).

51505141 is an equidigital number, since it uses as much as digits as its factorization.

51505141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88330.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 51505141 is about 7176.7082287076. The cubic root of 51505141 is about 372.0633226502.

Adding to 51505141 its reverse (14150515), we get a palindrome (65655656).

It can be divided in two parts, 5150514 and 1, that added together give a palindrome (5150515).

The spelling of 51505141 in words is "fifty-one million, five hundred five thousand, one hundred forty-one".