125553311 has 24 divisors (see below), whose sum is σ = 145682640. Its totient is φ = 107827200.

The previous prime is 125553301. The next prime is 125553319. The reversal of 125553311 is 113355521.

It is a happy number.

It is not a de Polignac number, because 125553311 - 2²⁶ = 58444447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125553319) 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 23 ways as a sum of consecutive naturals, for example, 195551 + ... + 196191.

It is an arithmetic number, because the mean of its divisors is an integer number (6070110).

Almost surely, 2^125553311 is an apocalyptic number.

125553311 is a deficient number, since it is larger than the sum of its proper divisors (20129329).

125553311 is a wasteful number, since it uses less digits than its factorization.

125553311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 734 counting only the distinct ones).

The product of its digits is 2250, while the sum is 26.

The square root of 125553311 is about 11205.0573849490. The cubic root of 125553311 is about 500.7366621248.

The spelling of 125553311 in words is "one hundred twenty-five million, five hundred fifty-three thousand, three hundred eleven".