3531123131 has 4 divisors (see below), whose sum is σ = 3531257352. Its totient is φ = 3530988912.

The previous prime is 3531123109. The next prime is 3531123133. The reversal of 3531123131 is 1313211353.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3531123131 is a prime.

It is a super-2 number, since 2×3531123131² = 24937661132566486322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3531123097 and 3531123106.

It is not an unprimeable number, because it can be changed into a prime (3531123133) 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, 13226 + ... + 85071.

It is an arithmetic number, because the mean of its divisors is an integer number (882814338).

Almost surely, 2^3531123131 is an apocalyptic number.

3531123131 is a deficient number, since it is larger than the sum of its proper divisors (134221).

3531123131 is an equidigital number, since it uses as much as digits as its factorization.

3531123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134220.

The product of its digits is 810, while the sum is 23.

The square root of 3531123131 is about 59423.2541266464. The cubic root of 3531123131 is about 1522.7816002122.

Adding to 3531123131 its reverse (1313211353), we get a palindrome (4844334484).

The spelling of 3531123131 in words is "three billion, five hundred thirty-one million, one hundred twenty-three thousand, one hundred thirty-one".