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72553201 = 723450641
BaseRepresentation
bin1000101001100…
…01001011110001
312001112002021121
410110301023301
5122033200301
611111022241
71540456240
oct424611361
9161462247
1072553201
1137a55326
122036a981
13120539b6
1498c8957
1565823a1
hex45312f1

72553201 has 8 divisors (see below), whose sum is σ = 86523264. Its totient is φ = 59484480.

The previous prime is 72553199. The next prime is 72553213. The reversal of 72553201 is 10235527.

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 72553201 - 21 = 72553199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72553241) 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, 225160 + ... + 225481.

It is an arithmetic number, because the mean of its divisors is an integer number (10815408).

Almost surely, 272553201 is an apocalyptic number.

It is an amenable number.

72553201 is a deficient number, since it is larger than the sum of its proper divisors (13970063).

72553201 is a wasteful number, since it uses less digits than its factorization.

72553201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450671.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 72553201 is about 8517.8166803471. The cubic root of 72553201 is about 417.0795144987.

Adding to 72553201 its reverse (10235527), we get a palindrome (82788728).

The spelling of 72553201 in words is "seventy-two million, five hundred fifty-three thousand, two hundred one".

Divisors: 1 7 23 161 450641 3154487 10364743 72553201