3123521340 has 48 divisors (see below), whose sum is σ = 9206171520. Its totient is φ = 789099840.

The previous prime is 3123521329. The next prime is 3123521369. The reversal of 3123521340 is 431253213.

It is a super-2 number, since 2×3123521340² = 19512771122870791200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3123521340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368826 + ... + 1371105.

It is an arithmetic number, because the mean of its divisors is an integer number (191795240).

Almost surely, 2^3123521340 is an apocalyptic number.

3123521340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3123521340 is an abundant number, since it is smaller than the sum of its proper divisors (6082650180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3123521340 is a wasteful number, since it uses less digits than its factorization.

3123521340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739962 (or 2739960 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 3123521340 is about 55888.4723355362. The cubic root of 3123521340 is about 1461.7782392298.

Adding to 3123521340 its reverse (431253213), we get a palindrome (3554774553).

The spelling of 3123521340 in words is "three billion, one hundred twenty-three million, five hundred twenty-one thousand, three hundred forty".