2165400932 has 6 divisors (see below), whose sum is σ = 3789451638. Its totient is φ = 1082700464.

The previous prime is 2165400899. The next prime is 2165400943. The reversal of 2165400932 is 2390045612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1361905216 + 803495716 = 36904^2 + 28346^2 .

It is a super-2 number, since 2×2165400932² = 9377922392612937248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270675113 + ... + 270675120.

It is an arithmetic number, because the mean of its divisors is an integer number (631575273).

Almost surely, 2^2165400932 is an apocalyptic number.

It is an amenable number.

2165400932 is a deficient number, since it is larger than the sum of its proper divisors (1624050706).

2165400932 is a wasteful number, since it uses less digits than its factorization.

2165400932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541350237 (or 541350235 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2165400932 is about 46533.8686549915. The cubic root of 2165400932 is about 1293.7373205382.

The spelling of 2165400932 in words is "two billion, one hundred sixty-five million, four hundred thousand, nine hundred thirty-two".