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7156428221 = 79823311003
BaseRepresentation
bin1101010101000111…
…00110110110111101
3200110202002012222002
412222203212312331
5104124021200341
63142043032045
7342225431135
oct65243466675
920422065862
107156428221
113042687498
12147880b625
138a0845a17
144bc639ac5
152bd41829b
hex1aa8e6dbd

7156428221 has 8 divisors (see below), whose sum is σ = 7248554880. Its totient is φ = 7064340192.

The previous prime is 7156428197. The next prime is 7156428229. The reversal of 7156428221 is 1228246517.

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 7156428221 - 226 = 7089319357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7156428229) 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, 644906 + ... + 655908.

It is an arithmetic number, because the mean of its divisors is an integer number (906069360).

Almost surely, 27156428221 is an apocalyptic number.

It is an amenable number.

7156428221 is a deficient number, since it is larger than the sum of its proper divisors (92126659).

7156428221 is a wasteful number, since it uses less digits than its factorization.

7156428221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19315.

The product of its digits is 53760, while the sum is 38.

The square root of 7156428221 is about 84595.6749544562. The cubic root of 7156428221 is about 1927.0756917292.

The spelling of 7156428221 in words is "seven billion, one hundred fifty-six million, four hundred twenty-eight thousand, two hundred twenty-one".

Divisors: 1 79 8233 11003 650407 869237 90587699 7156428221