102155711 has 4 divisors (see below), whose sum is σ = 116749392. Its totient is φ = 87562032.

The previous prime is 102155699. The next prime is 102155749. The reversal of 102155711 is 117551201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117551201 = 367 ⋅320303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102155711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102155311) 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, 7296830 + ... + 7296843.

It is an arithmetic number, because the mean of its divisors is an integer number (29187348).

Almost surely, 2^102155711 is an apocalyptic number.

102155711 is a deficient number, since it is larger than the sum of its proper divisors (14593681).

102155711 is an equidigital number, since it uses as much as digits as its factorization.

102155711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14593680.

The product of its (nonzero) digits is 350, while the sum is 23.

The square root of 102155711 is about 10107.2108417703. The cubic root of 102155711 is about 467.4705078291.

The spelling of 102155711 in words is "one hundred two million, one hundred fifty-five thousand, seven hundred eleven".