102155441 has 4 divisors (see below), whose sum is σ = 102448500. Its totient is φ = 101862384.

The previous prime is 102155423. The next prime is 102155461. The reversal of 102155441 is 144551201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31528225 + 70627216 = 5615^2 + 8404^2 .

It is a cyclic number.

It is not a de Polignac number, because 102155441 - 2⁶ = 102155377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102155461) 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, 146006 + ... + 146703.

It is an arithmetic number, because the mean of its divisors is an integer number (25612125).

Almost surely, 2^102155441 is an apocalyptic number.

It is an amenable number.

102155441 is a deficient number, since it is larger than the sum of its proper divisors (293059).

102155441 is an equidigital number, since it uses as much as digits as its factorization.

102155441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293058.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 102155441 is about 10107.1974849609. The cubic root of 102155441 is about 467.4700959834.

The spelling of 102155441 in words is "one hundred two million, one hundred fifty-five thousand, four hundred forty-one".