2155725770 has 32 divisors (see below), whose sum is σ = 4291064640. Its totient is φ = 773159040.

The previous prime is 2155725739. The next prime is 2155725773. The reversal of 2155725770 is 775275512.

It is not an unprimeable number, because it can be changed into a prime (2155725773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126200 + ... + 142259.

It is an arithmetic number, because the mean of its divisors is an integer number (134095770).

Almost surely, 2^2155725770 is an apocalyptic number.

2155725770 is a deficient number, since it is larger than the sum of its proper divisors (2135338870).

2155725770 is a wasteful number, since it uses less digits than its factorization.

2155725770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268550.

The product of its (nonzero) digits is 171500, while the sum is 41.

The square root of 2155725770 is about 46429.7939904971. The cubic root of 2155725770 is about 1291.8076075319.

The spelling of 2155725770 in words is "two billion, one hundred fifty-five million, seven hundred twenty-five thousand, seven hundred seventy".