43401231 has 16 divisors (see below), whose sum is σ = 64476000. Its totient is φ = 28854144.

The previous prime is 43401229. The next prime is 43401251. The reversal of 43401231 is 13210434.

43401231 is a `hidden beast` number, since 434 + 0 + 1 + 231 = 666.

It is not a de Polignac number, because 43401231 - 2¹ = 43401229 is a prime.

It is a super-2 number, since 2×43401231² = 3767333704630722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43401251) 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, 8695 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (4029750).

Almost surely, 2^43401231 is an apocalyptic number.

43401231 is a deficient number, since it is larger than the sum of its proper divisors (21074769).

43401231 is a wasteful number, since it uses less digits than its factorization.

43401231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455 (or 4449 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 43401231 is about 6587.9610654587. The cubic root of 43401231 is about 351.4261024302.

Adding to 43401231 its reverse (13210434), we get a palindrome (56611665).

The spelling of 43401231 in words is "forty-three million, four hundred one thousand, two hundred thirty-one".