1225201993 has 2 divisors, whose sum is σ = 1225201994. Its totient is φ = 1225201992.

The previous prime is 1225201981. The next prime is 1225202009. The reversal of 1225201993 is 3991025221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656999424 + 568202569 = 25632^2 + 23837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225201993 - 2¹⁷ = 1225070921 is a prime.

It is a super-2 number, since 2×1225201993² = 3002239847302344098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1225201693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612600996 + 612600997.

It is an arithmetic number, because the mean of its divisors is an integer number (612600997).

Almost surely, 2^1225201993 is an apocalyptic number.

It is an amenable number.

1225201993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225201993 is an equidigital number, since it uses as much as digits as its factorization.

1225201993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1225201993 is about 35002.8854953417. The cubic root of 1225201993 is about 1070.0462882121.

The spelling of 1225201993 in words is "one billion, two hundred twenty-five million, two hundred one thousand, nine hundred ninety-three".