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155230349 = 1718314987
BaseRepresentation
bin10010100000010…
…10000010001101
3101211002112000012
421100022002031
5304214332344
623223043005
73563302421
oct1120120215
9354075005
10155230349
117a69494a
1243ba0465
13262107a1
141688ab81
15d96429e
hex940a08d

155230349 has 8 divisors (see below), whose sum is σ = 164484288. Its totient is φ = 145990080.

The previous prime is 155230343. The next prime is 155230367. The reversal of 155230349 is 943032551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-155230349 is a prime.

It is a super-2 number, since 2×1552303492 = 48192922501323602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155230343) 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, 28634 + ... + 33620.

It is an arithmetic number, because the mean of its divisors is an integer number (20560536).

Almost surely, 2155230349 is an apocalyptic number.

It is an amenable number.

155230349 is a deficient number, since it is larger than the sum of its proper divisors (9253939).

155230349 is a wasteful number, since it uses less digits than its factorization.

155230349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6835.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 155230349 is about 12459.1472019557. The cubic root of 155230349 is about 537.4345032145.

The spelling of 155230349 in words is "one hundred fifty-five million, two hundred thirty thousand, three hundred forty-nine".

Divisors: 1 17 1831 4987 31127 84779 9131197 155230349