43120551 has 16 divisors (see below), whose sum is σ = 61012224. Its totient is φ = 26995584.

The previous prime is 43120549. The next prime is 43120591. The reversal of 43120551 is 15502134.

It is not a de Polignac number, because 43120551 - 2¹ = 43120549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43120541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36496 + ... + 37658.

It is an arithmetic number, because the mean of its divisors is an integer number (3813264).

Almost surely, 2^43120551 is an apocalyptic number.

43120551 is a deficient number, since it is larger than the sum of its proper divisors (17891673).

43120551 is a wasteful number, since it uses less digits than its factorization.

43120551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 43120551 is about 6566.6240184740. The cubic root of 43120551 is about 350.6668944701. Note that the first 3 decimals are identical.

Adding to 43120551 its reverse (15502134), we get a palindrome (58622685).

The spelling of 43120551 in words is "forty-three million, one hundred twenty thousand, five hundred fifty-one".