227780925697 has 4 divisors (see below), whose sum is σ = 245302535380. Its totient is φ = 210259316016.

The previous prime is 227780925607. The next prime is 227780925709. The reversal of 227780925697 is 796529087722.

It is a happy number.

It is a Cunningham number, because it is equal to 477264²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796529087722 = 2 ⋅398264543861.

It can be written as a sum of positive squares in 2 ways, for example, as 33695742096 + 194085183601 = 183564^2 + 440551^2 .

It is a cyclic number.

It is not a de Polignac number, because 227780925697 - 2²⁷ = 227646707969 is a prime.

It is a super-2 number, since 2×227780925697² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (227780925607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8760804822 + ... + 8760804847.

It is an arithmetic number, because the mean of its divisors is an integer number (61325633845).

Almost surely, 2^227780925697 is an apocalyptic number.

It is an amenable number.

227780925697 is a deficient number, since it is larger than the sum of its proper divisors (17521609683).

227780925697 is a wasteful number, since it uses less digits than its factorization.

227780925697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17521609682.

The product of its (nonzero) digits is 53343360, while the sum is 64.

The spelling of 227780925697 in words is "two hundred twenty-seven billion, seven hundred eighty million, nine hundred twenty-five thousand, six hundred ninety-seven".