125522551 has 32 divisors (see below), whose sum is σ = 160777728. Its totient is φ = 95178240.

The previous prime is 125522549. The next prime is 125522563. The reversal of 125522551 is 155225521.

It is a cyclic number.

It is not a de Polignac number, because 125522551 - 2¹ = 125522549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125522521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769996 + ... + 770158.

It is an arithmetic number, because the mean of its divisors is an integer number (5024304).

Almost surely, 2^125522551 is an apocalyptic number.

125522551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125522551 is a deficient number, since it is larger than the sum of its proper divisors (35255177).

125522551 is a wasteful number, since it uses less digits than its factorization.

125522551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its digits is 5000, while the sum is 28.

The square root of 125522551 is about 11203.6847063812. The cubic root of 125522551 is about 500.6957660368.

It can be divided in two parts, 1 and 25522551, that added together give a palindrome (25522552).

The spelling of 125522551 in words is "one hundred twenty-five million, five hundred twenty-two thousand, five hundred fifty-one".