125216511 has 12 divisors (see below), whose sum is σ = 194213592. Its totient is φ = 71552208.

The previous prime is 125216489. The next prime is 125216521. The reversal of 125216511 is 115612521.

It is not a de Polignac number, because 125216511 - 2⁷ = 125216383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125216521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425760 + ... + 426053.

It is an arithmetic number, because the mean of its divisors is an integer number (16184466).

Almost surely, 2^125216511 is an apocalyptic number.

125216511 is a deficient number, since it is larger than the sum of its proper divisors (68997081).

125216511 is an equidigital number, since it uses as much as digits as its factorization.

125216511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851830 (or 851823 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

The square root of 125216511 is about 11190.0183645962. The cubic root of 125216511 is about 500.2885148197.

The spelling of 125216511 in words is "one hundred twenty-five million, two hundred sixteen thousand, five hundred eleven".