102981181 has 4 divisors (see below), whose sum is σ = 103003264. Its totient is φ = 102959100.

The previous prime is 102981157. The next prime is 102981199. The reversal of 102981181 is 181189201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102981181 - 2⁵ = 102981149 is a prime.

It is a super-2 number, since 2×102981181² = 21210247280309522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102931181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005 + ... + 14386.

It is an arithmetic number, because the mean of its divisors is an integer number (25750816).

Almost surely, 2^102981181 is an apocalyptic number.

It is an amenable number.

102981181 is a deficient number, since it is larger than the sum of its proper divisors (22083).

102981181 is an equidigital number, since it uses as much as digits as its factorization.

102981181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22082.

The product of its (nonzero) digits is 1152, while the sum is 31.

The square root of 102981181 is about 10147.9643771547. The cubic root of 102981181 is about 468.7262644930.

The spelling of 102981181 in words is "one hundred two million, nine hundred eighty-one thousand, one hundred eighty-one".