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212666051 = 1325323743
BaseRepresentation
bin11001010110100…
…00011011000011
3112211011112222102
430223100123003
5413420303201
633034101015
75161426433
oct1453203303
9484145872
10212666051
11aa054174
125b27a76b
13350a0500
142035c2c3
1513a0c26b
hexcad06c3

212666051 has 12 divisors (see below), whose sum is σ = 234638208. Its totient is φ = 192595104.

The previous prime is 212666033. The next prime is 212666053. The reversal of 212666051 is 150666212.

It is not a de Polignac number, because 212666051 - 26 = 212665987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212666053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2915 + ... + 20828.

It is an arithmetic number, because the mean of its divisors is an integer number (19553184).

Almost surely, 2212666051 is an apocalyptic number.

212666051 is a deficient number, since it is larger than the sum of its proper divisors (21972157).

212666051 is a wasteful number, since it uses less digits than its factorization.

212666051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23822 (or 23809 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 212666051 is about 14583.0741272202. The cubic root of 212666051 is about 596.8969900654.

The spelling of 212666051 in words is "two hundred twelve million, six hundred sixty-six thousand, fifty-one".

Divisors: 1 13 53 169 689 8957 23743 308659 1258379 4012567 16358927 212666051