21532025243431 has 4 divisors (see below), whose sum is σ = 21536440262712. Its totient is φ = 21527610224152.

The previous prime is 21532025243389. The next prime is 21532025243459. The reversal of 21532025243431 is 13434252023512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21532025243431 - 2⁴¹ = 19333001987879 is a prime.

It is a super-2 number, since 2×21532025243431² (a number of 27 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 (21532025943431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207502325 + ... + 2207512078.

It is an arithmetic number, because the mean of its divisors is an integer number (5384110065678).

Almost surely, 2^{21532025243431} is an apocalyptic number.

21532025243431 is a deficient number, since it is larger than the sum of its proper divisors (4415019281).

21532025243431 is an equidigital number, since it uses as much as digits as its factorization.

21532025243431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415019280.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 21532025243431 its reverse (13434252023512), we get a palindrome (34966277266943).

The spelling of 21532025243431 in words is "twenty-one trillion, five hundred thirty-two billion, twenty-five million, two hundred forty-three thousand, four hundred thirty-one".