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1220030215 = 51169920857
BaseRepresentation
bin100100010111000…
…0010111100000111
310011000200221211021
41020232002330013
54444311431330
6321021252011
742143041255
oct11056027407
93130627737
101220030215
11576747838
122a0704007
131659b8591
14b80655d5
157219567a
hex48b82f07

1220030215 has 8 divisors (see below), whose sum is σ = 1464231600. Its totient is φ = 975893952.

The previous prime is 1220030209. The next prime is 1220030219. The reversal of 1220030215 is 5120300221.

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 1220030215 - 29 = 1220029703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220030219) 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, 48067 + ... + 68923.

It is an arithmetic number, because the mean of its divisors is an integer number (183028950).

Almost surely, 21220030215 is an apocalyptic number.

1220030215 is a deficient number, since it is larger than the sum of its proper divisors (244201385).

1220030215 is a wasteful number, since it uses less digits than its factorization.

1220030215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32561.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1220030215 is about 34928.9309169347. The cubic root of 1220030215 is about 1068.5385512853.

Adding to 1220030215 its reverse (5120300221), we get a palindrome (6340330436).

The spelling of 1220030215 in words is "one billion, two hundred twenty million, thirty thousand, two hundred fifteen".

Divisors: 1 5 11699 20857 58495 104285 244006043 1220030215