3120231531 has 12 divisors (see below), whose sum is σ = 4169660712. Its totient is φ = 2075488704.

The previous prime is 3120231511. The next prime is 3120231553. The reversal of 3120231531 is 1351320213.

It is not a de Polignac number, because 3120231531 - 2⁹ = 3120231019 is a prime.

It is a super-2 number, since 2×3120231531² = 19471689614093207922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3120231498 and 3120231507.

It is not an unprimeable number, because it can be changed into a prime (3120231511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 744915 + ... + 749091.

It is an arithmetic number, because the mean of its divisors is an integer number (347471726).

Almost surely, 2^3120231531 is an apocalyptic number.

3120231531 is a deficient number, since it is larger than the sum of its proper divisors (1049429181).

3120231531 is an frugal number, since it uses more digits than its factorization.

3120231531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178 (or 4679 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 3120231531 is about 55859.0326715385. The cubic root of 3120231531 is about 1461.2648591905.

Adding to 3120231531 its reverse (1351320213), we get a palindrome (4471551744).

The spelling of 3120231531 in words is "three billion, one hundred twenty million, two hundred thirty-one thousand, five hundred thirty-one".