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BaseRepresentation
bin100100101011111…
…1001101001100101
310011210100101120120
41021113321221211
510010114032323
6322052352153
742335226510
oct11127715145
93153311516
101231002213
11581961201
122a4315659
1316805a69c
14b96bdd77
15731115e3
hex495f9a65

1231002213 has 16 divisors (see below), whose sum is σ = 1883604096. Its totient is φ = 700508160.

The previous prime is 1231002211. The next prime is 1231002263. The reversal of 1231002213 is 3122001321.

Adding to 1231002213 its reverse (3122001321), we get a palindrome (4353003534).

It is not a de Polignac number, because 1231002213 - 21 = 1231002211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231002192 and 1231002201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231002211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116556 + ... + 126677.

It is an arithmetic number, because the mean of its divisors is an integer number (117725256).

Almost surely, 21231002213 is an apocalyptic number.

It is an amenable number.

1231002213 is a deficient number, since it is larger than the sum of its proper divisors (652601883).

1231002213 is a wasteful number, since it uses less digits than its factorization.

1231002213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243484.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1231002213 is about 35085.6411228297. The cubic root of 1231002213 is about 1071.7321967507.

The spelling of 1231002213 in words is "one billion, two hundred thirty-one million, two thousand, two hundred thirteen".