32400400531 has 2 divisors, whose sum is σ = 32400400532. Its totient is φ = 32400400530.

The previous prime is 32400400441. The next prime is 32400400547. The reversal of 32400400531 is 13500400423.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32400400531 is a prime.

It is a super-2 number, since 2×32400400531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32400400561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16200200265 + 16200200266.

It is an arithmetic number, because the mean of its divisors is an integer number (16200200266).

Almost surely, 2^32400400531 is an apocalyptic number.

32400400531 is a deficient number, since it is larger than the sum of its proper divisors (1).

32400400531 is an equidigital number, since it uses as much as digits as its factorization.

32400400531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 32400400531 its reverse (13500400423), we get a palindrome (45900800954).

The spelling of 32400400531 in words is "thirty-two billion, four hundred million, four hundred thousand, five hundred thirty-one".