3125115551 has 4 divisors (see below), whose sum is σ = 3125628792. Its totient is φ = 3124602312.

The previous prime is 3125115401. The next prime is 3125115569. The reversal of 3125115551 is 1555115213.

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-3125115551 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 (3125175551) 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 3 ways as a sum of consecutive naturals, for example, 247376 + ... + 259701.

It is an arithmetic number, because the mean of its divisors is an integer number (781407198).

Almost surely, 2^3125115551 is an apocalyptic number.

3125115551 is a deficient number, since it is larger than the sum of its proper divisors (513241).

3125115551 is an equidigital number, since it uses as much as digits as its factorization.

3125115551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513240.

The product of its digits is 3750, while the sum is 29.

The square root of 3125115551 is about 55902.7329475045. The cubic root of 3125115551 is about 1462.0268887869.

The spelling of 3125115551 in words is "three billion, one hundred twenty-five million, one hundred fifteen thousand, five hundred fifty-one".