102551 has 2 divisors, whose sum is σ = 102552. Its totient is φ = 102550.

The previous prime is 102547. The next prime is 102559. The reversal of 102551 is 155201.

It is a weak prime.

It is an emirp because it is prime and its reverse (155201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102551 - 2² = 102547 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51275 + 51276.

It is an arithmetic number, because the mean of its divisors is an integer number (51276).

2¹⁰²⁵⁵¹ is an apocalyptic number.

102551 is a deficient number, since it is larger than the sum of its proper divisors (1).

102551 is an equidigital number, since it uses as much as digits as its factorization.

102551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 102551 is about 320.2358505852. The cubic root of 102551 is about 46.8072686984.

Adding to 102551 its reverse (155201), we get a palindrome (257752).

Subtracting 102551 from its reverse (155201), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 102551 in words is "one hundred two thousand, five hundred fifty-one".