125252525251 has 32 divisors (see below), whose sum is σ = 153017278848. Its totient is φ = 100077895680.

The previous prime is 125252525221. The next prime is 125252525273. The reversal of 125252525251 is 152525252521.

It is not a de Polignac number, because 125252525251 - 2¹⁵ = 125252492483 is a prime.

It is a super-2 number, since 2×125252525251² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125252525251.

It is not an unprimeable number, because it can be changed into a prime (125252525221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26528571 + ... + 26533291.

It is an arithmetic number, because the mean of its divisors is an integer number (4781789964).

Almost surely, 2^125252525251 is an apocalyptic number.

125252525251 is a deficient number, since it is larger than the sum of its proper divisors (27764753597).

125252525251 is a wasteful number, since it uses less digits than its factorization.

125252525251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831.

The product of its digits is 100000, while the sum is 37.

Adding to 125252525251 its reverse (152525252521), we get a palindrome (277777777772).

It can be divided in two parts, 1 and 25252525251, that added together give a palindrome (25252525252).

The spelling of 125252525251 in words is "one hundred twenty-five billion, two hundred fifty-two million, five hundred twenty-five thousand, two hundred fifty-one".