2123510256 has 400 divisors, whose sum is σ = 7616030400. Its totient is φ = 568995840.

The previous prime is 2123510219. The next prime is 2123510287. The reversal of 2123510256 is 6520153212.

It is a happy number.

2123510256 is a `hidden beast` number, since 2 + 123 + 510 + 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 an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7556836 + ... + 7557116.

It is an arithmetic number, because the mean of its divisors is an integer number (19040076).

Almost surely, 2^2123510256 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 2123510256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3808015200).

2123510256 is an abundant number, since it is smaller than the sum of its proper divisors (5492520144).

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

2123510256 is a wasteful number, since it uses less digits than its factorization.

2123510256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 310 counting only the distinct ones).

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

The square root of 2123510256 is about 46081.5609110629. The cubic root of 2123510256 is about 1285.3402896966.

Adding to 2123510256 its reverse (6520153212), we get a palindrome (8643663468).

The spelling of 2123510256 in words is "two billion, one hundred twenty-three million, five hundred ten thousand, two hundred fifty-six".