125555132251 has 16 divisors (see below), whose sum is σ = 132195571200. Its totient is φ = 119072167200.

The previous prime is 125555132249. The next prime is 125555132273. The reversal of 125555132251 is 152231555521.

It is not a de Polignac number, because 125555132251 - 2¹ = 125555132249 is a prime.

It is a super-2 number, since 2×125555132251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125555132251.

It is not an unprimeable number, because it can be changed into a prime (125555132201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2076436 + ... + 2136046.

It is an arithmetic number, because the mean of its divisors is an integer number (8262223200).

Almost surely, 2^125555132251 is an apocalyptic number.

125555132251 is a deficient number, since it is larger than the sum of its proper divisors (6640438949).

125555132251 is a wasteful number, since it uses less digits than its factorization.

125555132251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60930.

The product of its digits is 75000, while the sum is 37.

Adding to 125555132251 its reverse (152231555521), we get a palindrome (277786687772).

The spelling of 125555132251 in words is "one hundred twenty-five billion, five hundred fifty-five million, one hundred thirty-two thousand, two hundred fifty-one".