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202131197 is a prime number
BaseRepresentation
bin11000000110001…
…00011011111101
3112002100022212122
430003010123331
5403221144242
632020212325
75003041532
oct1403043375
9462308778
10202131197
11a4109184
125783a0a5
1332b52378
141cbb8d89
hexc0c46fd

202131197 has 2 divisors, whose sum is σ = 202131198. Its totient is φ = 202131196.

The previous prime is 202131187. The next prime is 202131229. The reversal of 202131197 is 791131202.

202131197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181872196 + 20259001 = 13486^2 + 4501^2 .

It is a cyclic number.

It is not a de Polignac number, because 202131197 - 26 = 202131133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202131157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065598 + 101065599.

It is an arithmetic number, because the mean of its divisors is an integer number (101065599).

Almost surely, 2202131197 is an apocalyptic number.

It is an amenable number.

202131197 is a deficient number, since it is larger than the sum of its proper divisors (1).

202131197 is an equidigital number, since it uses as much as digits as its factorization.

202131197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 202131197 is about 14217.2851487195. The cubic root of 202131197 is about 586.8734320187.

Adding to 202131197 its reverse (791131202), we get a palindrome (993262399).

The spelling of 202131197 in words is "two hundred two million, one hundred thirty-one thousand, one hundred ninety-seven".