125223630551 has 4 divisors (see below), whose sum is σ = 125393081400. Its totient is φ = 125054179704.

The previous prime is 125223630503. The next prime is 125223630569. The reversal of 125223630551 is 155036322521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125223630551 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 (125223630151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84724316 + ... + 84725793.

It is an arithmetic number, because the mean of its divisors is an integer number (31348270350).

Almost surely, 2^125223630551 is an apocalyptic number.

125223630551 is a deficient number, since it is larger than the sum of its proper divisors (169450849).

125223630551 is an equidigital number, since it uses as much as digits as its factorization.

125223630551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169450848.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 125223630551 in words is "one hundred twenty-five billion, two hundred twenty-three million, six hundred thirty thousand, five hundred fifty-one".