3121354340 has 48 divisors (see below), whose sum is σ = 7088739840. Its totient is φ = 1147655040.

The previous prime is 3121354339. The next prime is 3121354351. The reversal of 3121354340 is 434531213.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37025 + ... + 87255.

It is an arithmetic number, because the mean of its divisors is an integer number (147682080).

Almost surely, 2^3121354340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121354340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3544369920).

3121354340 is an abundant number, since it is smaller than the sum of its proper divisors (3967385500).

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

3121354340 is a wasteful number, since it uses less digits than its factorization.

3121354340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50492 (or 50490 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3121354340 is about 55869.0821474633. The cubic root of 3121354340 is about 1461.4401159040.

Adding to 3121354340 its reverse (434531213), we get a palindrome (3555885553).

The spelling of 3121354340 in words is "three billion, one hundred twenty-one million, three hundred fifty-four thousand, three hundred forty".