71433021 has 16 divisors (see below), whose sum is σ = 107255808. Its totient is φ = 41895600.

The previous prime is 71433017. The next prime is 71433023. The reversal of 71433021 is 12033417.

It is not a de Polignac number, because 71433021 - 2² = 71433017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71433023) 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, 33891 + ... + 35936.

It is an arithmetic number, because the mean of its divisors is an integer number (6703488).

Almost surely, 2^71433021 is an apocalyptic number.

It is an amenable number.

71433021 is a deficient number, since it is larger than the sum of its proper divisors (35822787).

71433021 is a wasteful number, since it uses less digits than its factorization.

71433021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69872.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 71433021 is about 8451.8057833814. The cubic root of 71433021 is about 414.9218820399.

Adding to 71433021 its reverse (12033417), we get a palindrome (83466438).

The spelling of 71433021 in words is "seventy-one million, four hundred thirty-three thousand, twenty-one".