2102531256 has 192 divisors, whose sum is σ = 6783329280. Its totient is φ = 597663360.

The previous prime is 2102531251. The next prime is 2102531273. The reversal of 2102531256 is 6521352012.

It is a happy number.

2102531256 is a `hidden beast` number, since 2 + 102 + 531 + 25 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102531251) 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, 4993926 + ... + 4994346.

It is an arithmetic number, because the mean of its divisors is an integer number (35329840).

Almost surely, 2^2102531256 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 2102531256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3391664640).

2102531256 is an abundant number, since it is smaller than the sum of its proper divisors (4680798024).

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

2102531256 is a wasteful number, since it uses less digits than its factorization.

2102531256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2102531256 is about 45853.3668992801. The cubic root of 2102531256 is about 1281.0934780328.

Adding to 2102531256 its reverse (6521352012), we get a palindrome (8623883268).

The spelling of 2102531256 in words is "two billion, one hundred two million, five hundred thirty-one thousand, two hundred fifty-six".