1641231088531 has 4 divisors (see below), whose sum is σ = 1641667473864. Its totient is φ = 1640794703200.

The previous prime is 1641231088529. The next prime is 1641231088547. The reversal of 1641231088531 is 1358801321461.

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 1641231088531 - 2¹ = 1641231088529 is a prime.

It is a super-2 number, since 2×1641231088531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641231088561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218187025 + ... + 218194546.

It is an arithmetic number, because the mean of its divisors is an integer number (410416868466).

Almost surely, 2^{1641231088531} is an apocalyptic number.

1641231088531 is a deficient number, since it is larger than the sum of its proper divisors (436385333).

1641231088531 is an equidigital number, since it uses as much as digits as its factorization.

1641231088531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436385332.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 1641231088531 in words is "one trillion, six hundred forty-one billion, two hundred thirty-one million, eighty-eight thousand, five hundred thirty-one".