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BaseRepresentation
bin1000100101010…
…00111101011001
312000110201212211
410102220331121
5121412321400
611051035121
71532643421
oct422507531
9160421784
1071995225
1137704095
122013baa1
1311bb9a33
1497c1481
1564c1dba
hex44a8f59

71995225 has 9 divisors (see below), whose sum is σ = 89326717. Its totient is φ = 57562240.

The previous prime is 71995223. The next prime is 71995241. The reversal of 71995225 is 52259917.

The square root of 71995225 is 8485.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13564489 + 58430736 = 3683^2 + 7644^2 .

It is not a de Polignac number, because 71995225 - 21 = 71995223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71995223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 41577 + ... + 43273.

Almost surely, 271995225 is an apocalyptic number.

71995225 is the 8485-th square number.

71995225 is the 4243-rd centered octagonal number.

It is an amenable number.

71995225 is a deficient number, since it is larger than the sum of its proper divisors (17331492).

71995225 is an frugal number, since it uses more digits than its factorization.

71995225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404 (or 1702 counting only the distinct ones).

The product of its digits is 56700, while the sum is 40.

The cubic root of 71995225 is about 416.0075677402.

The spelling of 71995225 in words is "seventy-one million, nine hundred ninety-five thousand, two hundred twenty-five".