51345441 has 32 divisors (see below), whose sum is σ = 87310080. Its totient is φ = 29213568.

The previous prime is 51345439. The next prime is 51345473. The reversal of 51345441 is 14454315.

It is a happy number.

It is not a de Polignac number, because 51345441 - 2¹ = 51345439 is a prime.

It is a super-2 number, since 2×51345441² = 5272708622968962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51345421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59485 + ... + 60341.

It is an arithmetic number, because the mean of its divisors is an integer number (2728440).

Almost surely, 2^51345441 is an apocalyptic number.

It is an amenable number.

51345441 is a deficient number, since it is larger than the sum of its proper divisors (35964639).

51345441 is a wasteful number, since it uses less digits than its factorization.

51345441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1184 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 51345441 is about 7165.5733197002. The cubic root of 51345441 is about 371.6783770589.

Adding to 51345441 its reverse (14454315), we get a palindrome (65799756).

It can be divided in two parts, 513 and 45441, that added together give a palindrome (45954).

The spelling of 51345441 in words is "fifty-one million, three hundred forty-five thousand, four hundred forty-one".