2139521055 has 48 divisors (see below), whose sum is σ = 4032645120. Its totient is φ = 965659968.

The previous prime is 2139521053. The next prime is 2139521057. The reversal of 2139521055 is 5501259312.

It is an interprime number because it is at equal distance from previous prime (2139521053) and next prime (2139521057).

It is not a de Polignac number, because 2139521055 - 2¹ = 2139521053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139521051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39642 + ... + 76488.

It is an arithmetic number, because the mean of its divisors is an integer number (84013440).

Almost surely, 2^2139521055 is an apocalyptic number.

2139521055 is a deficient number, since it is larger than the sum of its proper divisors (1893124065).

2139521055 is a wasteful number, since it uses less digits than its factorization.

2139521055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36948 (or 36941 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 2139521055 is about 46254.9570857006. The cubic root of 2139521055 is about 1288.5625988176.

The spelling of 2139521055 in words is "two billion, one hundred thirty-nine million, five hundred twenty-one thousand, fifty-five".