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90260221 = 573715733
BaseRepresentation
bin1010110000101…
…00001011111101
320021211200202011
411120110023331
5141101311341
612542331221
72144125222
oct530241375
9207750664
1090260221
1146a49927
1226289b11
131591351c
14bdb7949
157dcdb81
hex56142fd

90260221 has 4 divisors (see below), whose sum is σ = 90281692. Its totient is φ = 90238752.

The previous prime is 90260201. The next prime is 90260249. The reversal of 90260221 is 12206209.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3956121 + 86304100 = 1989^2 + 9290^2 .

It is a cyclic number.

It is not a de Polignac number, because 90260221 - 211 = 90258173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90260192 and 90260201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90260201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130 + ... + 13603.

It is an arithmetic number, because the mean of its divisors is an integer number (22570423).

Almost surely, 290260221 is an apocalyptic number.

It is an amenable number.

90260221 is a deficient number, since it is larger than the sum of its proper divisors (21471).

90260221 is a wasteful number, since it uses less digits than its factorization.

90260221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21470.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 90260221 is about 9500.5379321384. The cubic root of 90260221 is about 448.5719685473.

The spelling of 90260221 in words is "ninety million, two hundred sixty thousand, two hundred twenty-one".

Divisors: 1 5737 15733 90260221