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131202331 = 1343792971
BaseRepresentation
bin1111101000111…
…11110100011011
3100010212202202121
413310133310123
5232041433311
621004042111
73152126041
oct764376433
9303782677
10131202331
1168073287
1237b33337
1321249b20
14135d4391
15b7b9b71
hex7d1fd1b

131202331 has 16 divisors (see below), whose sum is σ = 146460160. Its totient is φ = 116756640.

The previous prime is 131202301. The next prime is 131202347. The reversal of 131202331 is 133202131.

It is not a de Polignac number, because 131202331 - 225 = 97647899 is a prime.

It is a super-2 number, since 2×1312023312 = 34428103319667122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131202301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42676 + ... + 45646.

It is an arithmetic number, because the mean of its divisors is an integer number (9153760).

Almost surely, 2131202331 is an apocalyptic number.

131202331 is a deficient number, since it is larger than the sum of its proper divisors (15257829).

131202331 is a wasteful number, since it uses less digits than its factorization.

131202331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131202331 is about 11454.3586027328. The cubic root of 131202331 is about 508.1366463887.

Adding to 131202331 its reverse (133202131), we get a palindrome (264404462).

It can be divided in two parts, 13120 and 2331, that added together give a palindrome (15451).

The spelling of 131202331 in words is "one hundred thirty-one million, two hundred two thousand, three hundred thirty-one".

Divisors: 1 13 43 79 559 1027 2971 3397 38623 44161 127753 234709 1660789 3051217 10092487 131202331