2015125550 has 48 divisors (see below), whose sum is σ = 3923748864. Its totient is φ = 769020000.

The previous prime is 2015125547. The next prime is 2015125559. The reversal of 2015125550 is 555215102.

It is a super-4 number, since 4×2015125550⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015125559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100895 + ... + 119205.

It is an arithmetic number, because the mean of its divisors is an integer number (81744768).

Almost surely, 2^2015125550 is an apocalyptic number.

2015125550 is a deficient number, since it is larger than the sum of its proper divisors (1908623314).

2015125550 is a wasteful number, since it uses less digits than its factorization.

2015125550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425 (or 18420 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 2015125550 is about 44890.1498103983. The cubic root of 2015125550 is about 1263.0892429627.

The spelling of 2015125550 in words is "two billion, fifteen million, one hundred twenty-five thousand, five hundred fifty".