43142572391 has 16 divisors (see below), whose sum is σ = 46082530560. Its totient is φ = 40292017920.

The previous prime is 43142572387. The next prime is 43142572423. The reversal of 43142572391 is 19327524134.

It is a cyclic number.

It is not a de Polignac number, because 43142572391 - 2² = 43142572387 is a prime.

It is a super-2 number, since 2×43142572391² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43142572321) 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, 3317540 + ... + 3330518.

It is an arithmetic number, because the mean of its divisors is an integer number (2880158160).

Almost surely, 2^43142572391 is an apocalyptic number.

43142572391 is a deficient number, since it is larger than the sum of its proper divisors (2939958169).

43142572391 is a wasteful number, since it uses less digits than its factorization.

43142572391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16406.

The product of its digits is 181440, while the sum is 41.

The spelling of 43142572391 in words is "forty-three billion, one hundred forty-two million, five hundred seventy-two thousand, three hundred ninety-one".