2115732138 has 32 divisors (see below), whose sum is σ = 4558739136. Its totient is φ = 650740608.

The previous prime is 2115732133. The next prime is 2115732173. The reversal of 2115732138 is 8312375112.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2115732099 and 2115732108.

It is not an unprimeable number, because it can be changed into a prime (2115732133) 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, 337206 + ... + 343422.

It is an arithmetic number, because the mean of its divisors is an integer number (142460598).

Almost surely, 2^2115732138 is an apocalyptic number.

2115732138 is an abundant number, since it is smaller than the sum of its proper divisors (2443006998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2115732138 is a wasteful number, since it uses less digits than its factorization.

2115732138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10598.

The product of its digits is 10080, while the sum is 33.

The square root of 2115732138 is about 45997.0883643737. The cubic root of 2115732138 is about 1283.7690297468.

The spelling of 2115732138 in words is "two billion, one hundred fifteen million, seven hundred thirty-two thousand, one hundred thirty-eight".