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102242131 = 1722811259
BaseRepresentation
bin1100001100000…
…01011101010011
321010101102211121
412012001131103
5202133222011
614051223111
72351021005
oct606013523
9233342747
10102242131
1152793032
122a2a7a97
131824a204
14d816375
158e98e71
hex6181753

102242131 has 12 divisors (see below), whose sum is σ = 109083240. Its totient is φ = 95809280.

The previous prime is 102242099. The next prime is 102242143. The reversal of 102242131 is 131242201.

It is not a de Polignac number, because 102242131 - 25 = 102242099 is a prime.

It is a super-2 number, since 2×1022421312 = 20906906702842322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102242431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80580 + ... + 81838.

It is an arithmetic number, because the mean of its divisors is an integer number (9090270).

Almost surely, 2102242131 is an apocalyptic number.

102242131 is a deficient number, since it is larger than the sum of its proper divisors (6841109).

102242131 is a wasteful number, since it uses less digits than its factorization.

102242131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 102242131 is about 10111.4851035839. The cubic root of 102242131 is about 467.6022916660.

Adding to 102242131 its reverse (131242201), we get a palindrome (233484332).

The spelling of 102242131 in words is "one hundred two million, two hundred forty-two thousand, one hundred thirty-one".

Divisors: 1 17 281 289 1259 4777 21403 81209 353779 363851 6014243 102242131