51767145 has 24 divisors (see below), whose sum is σ = 90075336. Its totient is φ = 27502848.

The previous prime is 51767143. The next prime is 51767171. The reversal of 51767145 is 54176715.

It can be written as a sum of positive squares in 4 ways, for example, as 1937664 + 49829481 = 1392^2 + 7059^2 .

It is not a de Polignac number, because 51767145 - 2¹ = 51767143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51767143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10389 + ... + 14541.

It is an arithmetic number, because the mean of its divisors is an integer number (3753139).

Almost surely, 2^51767145 is an apocalyptic number.

It is an amenable number.

51767145 is a deficient number, since it is larger than the sum of its proper divisors (38308191).

51767145 is a wasteful number, since it uses less digits than its factorization.

51767145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441 (or 4438 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 51767145 is about 7194.9388461612. The cubic root of 51767145 is about 372.6931448842.

It can be divided in two parts, 5176 and 7145, that added together give a palindrome (12321).

The spelling of 51767145 in words is "fifty-one million, seven hundred sixty-seven thousand, one hundred forty-five".