1455113221 has 2 divisors, whose sum is σ = 1455113222. Its totient is φ = 1455113220.

The previous prime is 1455113201. The next prime is 1455113237. The reversal of 1455113221 is 1223115541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1313265121 + 141848100 = 36239^2 + 11910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455113221 - 2¹⁵ = 1455080453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1455113201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727556610 + 727556611.

It is an arithmetic number, because the mean of its divisors is an integer number (727556611).

Almost surely, 2^1455113221 is an apocalyptic number.

It is an amenable number.

1455113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455113221 is an equidigital number, since it uses as much as digits as its factorization.

1455113221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 1455113221 is about 38145.9463246096. The cubic root of 1455113221 is about 1133.1800731530.

Adding to 1455113221 its reverse (1223115541), we get a palindrome (2678228762).

It can be divided in two parts, 14551 and 13221, that added together give a palindrome (27772).

The spelling of 1455113221 in words is "one billion, four hundred fifty-five million, one hundred thirteen thousand, two hundred twenty-one".