109781315 has 24 divisors (see below), whose sum is σ = 154242000. Its totient is φ = 74789568.

The previous prime is 109781311. The next prime is 109781317. The reversal of 109781315 is 513187901.

It is not a de Polignac number, because 109781315 - 2² = 109781311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (109781311) 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 23 ways as a sum of consecutive naturals, for example, 38561 + ... + 41309.

It is an arithmetic number, because the mean of its divisors is an integer number (6426750).

Almost surely, 2^109781315 is an apocalyptic number.

109781315 is a deficient number, since it is larger than the sum of its proper divisors (44460685).

109781315 is a wasteful number, since it uses less digits than its factorization.

109781315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931 (or 2924 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 109781315 is about 10477.6578966866. The cubic root of 109781315 is about 478.8242563775.

The spelling of 109781315 in words is "one hundred nine million, seven hundred eighty-one thousand, three hundred fifteen".