102155423 has 2 divisors, whose sum is σ = 102155424. Its totient is φ = 102155422.

The previous prime is 102155399. The next prime is 102155461. The reversal of 102155423 is 324551201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102155423 - 2¹² = 102151327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102155923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51077711 + 51077712.

It is an arithmetic number, because the mean of its divisors is an integer number (51077712).

Almost surely, 2^102155423 is an apocalyptic number.

102155423 is a deficient number, since it is larger than the sum of its proper divisors (1).

102155423 is an equidigital number, since it uses as much as digits as its factorization.

102155423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 102155423 is about 10107.1965945063. The cubic root of 102155423 is about 467.4700685270.

The spelling of 102155423 in words is "one hundred two million, one hundred fifty-five thousand, four hundred twenty-three".