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BaseRepresentation
bin11001000000011111
312012111202
4121000133
511234211
62110115
7604430
oct310037
9165452
10102431
116aa5a
124b33b
1337814
1429487
152053b
hex1901f

102431 has 4 divisors (see below), whose sum is σ = 117072. Its totient is φ = 87792.

The previous prime is 102409. The next prime is 102433. The reversal of 102431 is 134201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134201 = 672003.

It is a cyclic number.

It is not a de Polignac number, because 102431 - 26 = 102367 is a prime.

It is a super-2 number, since 2×1024312 = 20984219522, 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 (102433) 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, 7310 + ... + 7323.

It is an arithmetic number, because the mean of its divisors is an integer number (29268).

2102431 is an apocalyptic number.

102431 is a deficient number, since it is larger than the sum of its proper divisors (14641).

102431 is an equidigital number, since it uses as much as digits as its factorization.

102431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14640.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102431 is about 320.0484338346. The cubic root of 102431 is about 46.7890044054.

Adding to 102431 its reverse (134201), we get a palindrome (236632).

It can be divided in two parts, 10 and 2431, that multiplied together give a triangular number (24310 = T220).

The spelling of 102431 in words is "one hundred two thousand, four hundred thirty-one".

Divisors: 1 7 14633 102431