103213261 has 2 divisors, whose sum is σ = 103213262. Its totient is φ = 103213260.

The previous prime is 103213249. The next prime is 103213283. The reversal of 103213261 is 162312301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84290761 + 18922500 = 9181^2 + 4350^2 .

It is a cyclic number.

It is not a de Polignac number, because 103213261 - 2⁹ = 103212749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103213661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51606630 + 51606631.

It is an arithmetic number, because the mean of its divisors is an integer number (51606631).

Almost surely, 2^103213261 is an apocalyptic number.

It is an amenable number.

103213261 is a deficient number, since it is larger than the sum of its proper divisors (1).

103213261 is an equidigital number, since it uses as much as digits as its factorization.

103213261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 103213261 is about 10159.3927476006. The cubic root of 103213261 is about 469.0781099304.

Adding to 103213261 its reverse (162312301), we get a palindrome (265525562).

The spelling of 103213261 in words is "one hundred three million, two hundred thirteen thousand, two hundred sixty-one".