201438043 has 16 divisors (see below), whose sum is σ = 211236480. Its totient is φ = 191923200.

The previous prime is 201438023. The next prime is 201438047. The reversal of 201438043 is 340834102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201438043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201437999 and 201438017.

It is not an unprimeable number, because it can be changed into a prime (201438047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597571 + ... + 597907.

It is an arithmetic number, because the mean of its divisors is an integer number (13202280).

Almost surely, 2^201438043 is an apocalyptic number.

201438043 is a deficient number, since it is larger than the sum of its proper divisors (9798437).

201438043 is a wasteful number, since it uses less digits than its factorization.

201438043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 201438043 is about 14192.8870565505. The cubic root of 201438043 is about 586.2018227587.

It can be divided in two parts, 201 and 438043, that added together give a square (438244 = 662²).

The spelling of 201438043 in words is "two hundred one million, four hundred thirty-eight thousand, forty-three".