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30880551 = 3131747991
BaseRepresentation
bin111010111001…
…1001100100111
32011002220011010
41311303030213
530401134201
63021513303
7523323522
oct165631447
964086133
1030880551
1116482019
12a412833
136522a20
14415bbb9
152a9ebd6
hex1d73327

30880551 has 32 divisors (see below), whose sum is σ = 47996928. Its totient is φ = 17487360.

The previous prime is 30880537. The next prime is 30880589. The reversal of 30880551 is 15508803.

It is a happy number.

It is not a de Polignac number, because 30880551 - 25 = 30880519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30880511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30666 + ... + 31656.

It is an arithmetic number, because the mean of its divisors is an integer number (1499904).

Almost surely, 230880551 is an apocalyptic number.

30880551 is a deficient number, since it is larger than the sum of its proper divisors (17116377).

30880551 is a wasteful number, since it uses less digits than its factorization.

30880551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 30880551 is about 5557.0271728686. The cubic root of 30880551 is about 313.7340676449.

The spelling of 30880551 in words is "thirty million, eight hundred eighty thousand, five hundred fifty-one".

Divisors: 1 3 13 17 39 47 51 141 221 611 663 799 991 1833 2397 2973 10387 12883 16847 31161 38649 46577 50541 139731 219011 605501 657033 791809 1816503 2375427 10293517 30880551