5261021250 has 160 divisors (see below), whose sum is σ = 13550412480. Its totient is φ = 1360800000.

The previous prime is 5261021197. The next prime is 5261021257. The reversal of 5261021250 is 521201625.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 5261021250.

It is not an unprimeable number, because it can be changed into a prime (5261021257) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 24933645 + ... + 24933855.

It is an arithmetic number, because the mean of its divisors is an integer number (84690078).

Almost surely, 2^5261021250 is an apocalyptic number.

5261021250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5261021250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6775206240).

5261021250 is an abundant number, since it is smaller than the sum of its proper divisors (8289391230).

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

5261021250 is a wasteful number, since it uses less digits than its factorization.

5261021250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 5261021250 is about 72532.8977085570. The cubic root of 5261021250 is about 1739.2286679001.

Adding to 5261021250 its reverse (521201625), we get a palindrome (5782222875).

The spelling of 5261021250 in words is "five billion, two hundred sixty-one million, twenty-one thousand, two hundred fifty".