43151121 has 24 divisors (see below), whose sum is σ = 67365480. Its totient is φ = 26459136.

The previous prime is 43151099. The next prime is 43151131. The reversal of 43151121 is 12115134.

It can be written as a sum of positive squares in 4 ways, for example, as 65025 + 43086096 = 255^2 + 6564^2 .

It is not a de Polignac number, because 43151121 - 2⁵ = 43151089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43151094 and 43151103.

It is not an unprimeable number, because it can be changed into a prime (43151131) 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, 45985 + ... + 46913.

It is an arithmetic number, because the mean of its divisors is an integer number (2806895).

Almost surely, 2^43151121 is an apocalyptic number.

It is an amenable number.

43151121 is a deficient number, since it is larger than the sum of its proper divisors (24214359).

43151121 is a wasteful number, since it uses less digits than its factorization.

43151121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1342 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 43151121 is about 6568.9512861643. The cubic root of 43151121 is about 350.7497424737.

Adding to 43151121 its reverse (12115134), we get a palindrome (55266255).

The spelling of 43151121 in words is "forty-three million, one hundred fifty-one thousand, one hundred twenty-one".