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16242031 = 137117597
BaseRepresentation
bin111101111101…
…010101101111
31010120011212201
4331331111233
513124221111
61340042331
7255024601
oct75752557
933504781
1016242031
119193973
1255333a7
133498a90
14222b171
15165c6c1
hexf7d56f

16242031 has 8 divisors (see below), whose sum is σ = 17738784. Its totient is φ = 14780640.

The previous prime is 16242019. The next prime is 16242053. The reversal of 16242031 is 13024261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16242031 - 211 = 16239983 is a prime.

It is a super-2 number, since 2×162420312 = 527607142009922, 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 (16242431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7876 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (2217348).

Almost surely, 216242031 is an apocalyptic number.

16242031 is a deficient number, since it is larger than the sum of its proper divisors (1496753).

16242031 is a wasteful number, since it uses less digits than its factorization.

16242031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17681.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 16242031 is about 4030.1403201377. The cubic root of 16242031 is about 253.2484397373.

Adding to 16242031 its reverse (13024261), we get a palindrome (29266292).

It can be divided in two parts, 1624 and 2031, that added together give a triangular number (3655 = T85).

The spelling of 16242031 in words is "sixteen million, two hundred forty-two thousand, thirty-one".

Divisors: 1 13 71 923 17597 228761 1249387 16242031