102155044 has 12 divisors (see below), whose sum is σ = 184538368. Its totient is φ = 49429800.

The previous prime is 102154993. The next prime is 102155047. The reversal of 102155044 is 440551201.

It is not an unprimeable number, because it can be changed into a prime (102155047) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 411792 + ... + 412039.

Almost surely, 2^102155044 is an apocalyptic number.

It is an amenable number.

102155044 is a deficient number, since it is larger than the sum of its proper divisors (82383324).

102155044 is a wasteful number, since it uses less digits than its factorization.

102155044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823866 (or 823864 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 102155044 is about 10107.1778454720. The cubic root of 102155044 is about 467.4694904165.

It can be divided in two parts, 1021 and 55044, that added together give a palindrome (56065).

The spelling of 102155044 in words is "one hundred two million, one hundred fifty-five thousand, forty-four".