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131122145 = 5711340577
BaseRepresentation
bin1111101000011…
…00001111100001
3100010201200202202
413310030033201
5232031402040
621002222545
73151343210
oct764141741
9303650682
10131122145
1168019010
1237ab4a55
132121c48b
14135b3077
15b7a1015
hex7d0c3e1

131122145 has 16 divisors (see below), whose sum is σ = 196172928. Its totient is φ = 81738240.

The previous prime is 131122133. The next prime is 131122153. The reversal of 131122145 is 541221131.

It is not a de Polignac number, because 131122145 - 24 = 131122129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169904 + ... + 170673.

It is an arithmetic number, because the mean of its divisors is an integer number (12260808).

Almost surely, 2131122145 is an apocalyptic number.

It is an amenable number.

131122145 is a deficient number, since it is larger than the sum of its proper divisors (65050783).

131122145 is a wasteful number, since it uses less digits than its factorization.

131122145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340600.

The product of its digits is 240, while the sum is 20.

The square root of 131122145 is about 11450.8578281280. The cubic root of 131122145 is about 508.0331072002.

Adding to 131122145 its reverse (541221131), we get a palindrome (672343276).

The spelling of 131122145 in words is "one hundred thirty-one million, one hundred twenty-two thousand, one hundred forty-five".

Divisors: 1 5 7 11 35 55 77 385 340577 1702885 2384039 3746347 11920195 18731735 26224429 131122145