2105207156 has 24 divisors (see below), whose sum is σ = 4064278344. Its totient is φ = 947934720.

The previous prime is 2105207147. The next prime is 2105207161. The reversal of 2105207156 is 6517025012.

It can be written as a sum of positive squares in 4 ways, for example, as 409414756 + 1695792400 = 20234^2 + 41180^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491585 + ... + 495848.

It is an arithmetic number, because the mean of its divisors is an integer number (169344931).

Almost surely, 2^2105207156 is an apocalyptic number.

2105207156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2105207156 is a deficient number, since it is larger than the sum of its proper divisors (1959071188).

2105207156 is a wasteful number, since it uses less digits than its factorization.

2105207156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987491 (or 987489 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 2105207156 is about 45882.5365035544. The cubic root of 2105207156 is about 1281.6367319077.

The spelling of 2105207156 in words is "two billion, one hundred five million, two hundred seven thousand, one hundred fifty-six".