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30030231 = 3711711831
BaseRepresentation
bin111001010001…
…1100110010111
32002111200201210
41302203212113
530141431411
62551352503
7513152460
oct162434627
962450653
1030030231
1115a51180
12a082733
1362b598a
143db9d67
152982ca6
hex1ca3997

30030231 has 32 divisors (see below), whose sum is σ = 50651136. Its totient is φ = 15372000.

The previous prime is 30030181. The next prime is 30030269. The reversal of 30030231 is 13203003.

It is a happy number.

It is not a de Polignac number, because 30030231 - 29 = 30029719 is a prime.

It is a super-2 number, since 2×300302312 = 1803629547826722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30030031) 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, 15486 + ... + 17316.

It is an arithmetic number, because the mean of its divisors is an integer number (1582848).

Almost surely, 230030231 is an apocalyptic number.

30030231 is a deficient number, since it is larger than the sum of its proper divisors (20620905).

30030231 is a wasteful number, since it uses less digits than its factorization.

30030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 30030231 is about 5479.9845802703. The cubic root of 30030231 is about 310.8275874963.

Adding to 30030231 its reverse (13203003), we get a palindrome (43233234).

The spelling of 30030231 in words is "thirty million, thirty thousand, two hundred thirty-one".

Divisors: 1 3 7 11 21 33 71 77 213 231 497 781 1491 1831 2343 5467 5493 12817 16401 20141 38451 60423 130001 140987 390003 422961 910007 1430011 2730021 4290033 10010077 30030231