125215215455 has 32 divisors (see below), whose sum is σ = 167493547008. Its totient is φ = 89089187200.

The previous prime is 125215215449. The next prime is 125215215467. The reversal of 125215215455 is 554512512521.

It is not a de Polignac number, because 125215215455 - 2²⁰ = 125214166879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 949610 + ... + 1073400.

It is an arithmetic number, because the mean of its divisors is an integer number (5234173344).

Almost surely, 2^125215215455 is an apocalyptic number.

125215215455 is a deficient number, since it is larger than the sum of its proper divisors (42278331553).

125215215455 is a wasteful number, since it uses less digits than its factorization.

125215215455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124207.

The product of its digits is 100000, while the sum is 38.

Adding to 125215215455 its reverse (554512512521), we get a palindrome (679727727976).

The spelling of 125215215455 in words is "one hundred twenty-five billion, two hundred fifteen million, two hundred fifteen thousand, four hundred fifty-five".