3261543361531 has 48 divisors (see below), whose sum is σ = 4185654891264. Its totient is φ = 2517688305216.

The previous prime is 3261543361471. The next prime is 3261543361577. The reversal of 3261543361531 is 1351633451623.

It is not a de Polignac number, because 3261543361531 - 2¹³ = 3261543353339 is a prime.

It is a super-2 number, since 2×3261543361531² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (3261543361831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24228696 + ... + 24362938.

It is an arithmetic number, because the mean of its divisors is an integer number (87201143568).

Almost surely, 2^{3261543361531} is an apocalyptic number.

3261543361531 is a deficient number, since it is larger than the sum of its proper divisors (924111529733).

3261543361531 is a wasteful number, since it uses less digits than its factorization.

3261543361531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135200 (or 135193 counting only the distinct ones).

The product of its digits is 583200, while the sum is 43.

The spelling of 3261543361531 in words is "three trillion, two hundred sixty-one billion, five hundred forty-three million, three hundred sixty-one thousand, five hundred thirty-one".