43521142023 has 8 divisors (see below), whose sum is σ = 64475766000. Its totient is φ = 29014094664.

The previous prime is 43521141959. The next prime is 43521142031. The reversal of 43521142023 is 32024112534.

43521142023 is a `hidden beast` number, since 4 + 3 + 5 + 211 + 420 + 23 = 666.

It is not a de Polignac number, because 43521142023 - 2⁶ = 43521141959 is a prime.

It is a super-2 number, since 2×43521142023² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1611894149 = 43521142023 / (4 + 3 + 5 + 2 + 1 + 1 + 4 + 2 + 0 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43521142123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805947048 + ... + 805947101.

It is an arithmetic number, because the mean of its divisors is an integer number (8059470750).

Almost surely, 2^43521142023 is an apocalyptic number.

43521142023 is a deficient number, since it is larger than the sum of its proper divisors (20954623977).

43521142023 is a wasteful number, since it uses less digits than its factorization.

43521142023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611894158 (or 1611894152 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 43521142023 its reverse (32024112534), we get a palindrome (75545254557).

The spelling of 43521142023 in words is "forty-three billion, five hundred twenty-one million, one hundred forty-two thousand, twenty-three".