225101761 has 2 divisors, whose sum is σ = 225101762. Its totient is φ = 225101760.

The previous prime is 225101749. The next prime is 225101771. The reversal of 225101761 is 167101522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225000000 + 101761 = 15000^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 225101761 - 2⁵ = 225101729 is a prime.

It is a super-2 number, since 2×225101761² = 101341605610602242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225101771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112550880 + 112550881.

It is an arithmetic number, because the mean of its divisors is an integer number (112550881).

Almost surely, 2^225101761 is an apocalyptic number.

It is an amenable number.

225101761 is a deficient number, since it is larger than the sum of its proper divisors (1).

225101761 is an equidigital number, since it uses as much as digits as its factorization.

225101761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 225101761 is about 15003.3916498904. The cubic root of 225101761 is about 608.3118792125.

It can be divided in two parts, 225 and 101761, that multiplied together give a square (22896225 = 4785²).

The spelling of 225101761 in words is "two hundred twenty-five million, one hundred one thousand, seven hundred sixty-one".