2105157772 has 24 divisors (see below), whose sum is σ = 3792330080. Its totient is φ = 1021766400.

The previous prime is 2105157767. The next prime is 2105157773. The reversal of 2105157772 is 2777515012.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (2105157773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48772 + ... + 81172.

Almost surely, 2^2105157772 is an apocalyptic number.

It is an amenable number.

2105157772 is a deficient number, since it is larger than the sum of its proper divisors (1687172308).

2105157772 is a wasteful number, since it uses less digits than its factorization.

2105157772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32881 (or 32879 counting only the distinct ones).

The product of its (nonzero) digits is 34300, while the sum is 37.

The square root of 2105157772 is about 45881.9983435770. The cubic root of 2105157772 is about 1281.6267102742.

The spelling of 2105157772 in words is "two billion, one hundred five million, one hundred fifty-seven thousand, seven hundred seventy-two".