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31050213 = 3291732063
BaseRepresentation
bin111011001110…
…0100111100101
32011102111212220
41312130213211
530422101323
63025302553
7524631255
oct166344745
964374786
1031050213
1116588537
12a494a59
13658200c
1441a3965
152ad50e3
hex1d9c9e5

31050213 has 16 divisors (see below), whose sum is σ = 43096320. Its totient is φ = 19861184.

The previous prime is 31050203. The next prime is 31050247. The reversal of 31050213 is 31205013.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31050213 - 24 = 31050197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31050192 and 31050201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31050203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14020 + ... + 16082.

It is an arithmetic number, because the mean of its divisors is an integer number (2693520).

Almost surely, 231050213 is an apocalyptic number.

It is an amenable number.

31050213 is a deficient number, since it is larger than the sum of its proper divisors (12046107).

31050213 is a wasteful number, since it uses less digits than its factorization.

31050213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 31050213 is about 5572.2717988268. The cubic root of 31050213 is about 314.3075846548.

Adding to 31050213 its reverse (31205013), we get a palindrome (62255226).

The spelling of 31050213 in words is "thirty-one million, fifty thousand, two hundred thirteen".

Divisors: 1 3 29 87 173 519 2063 5017 6189 15051 59827 179481 356899 1070697 10350071 31050213