1345222237 has 2 divisors, whose sum is σ = 1345222238. Its totient is φ = 1345222236.

The previous prime is 1345222231. The next prime is 1345222253. The reversal of 1345222237 is 7322225431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1274561401 + 70660836 = 35701^2 + 8406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345222237 - 2²³ = 1336833629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1345222199 and 1345222208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345222231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672611118 + 672611119.

It is an arithmetic number, because the mean of its divisors is an integer number (672611119).

Almost surely, 2^1345222237 is an apocalyptic number.

It is an amenable number.

1345222237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345222237 is an equidigital number, since it uses as much as digits as its factorization.

1345222237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 31.

The square root of 1345222237 is about 36677.2713952388. The cubic root of 1345222237 is about 1103.9040988797.

Adding to 1345222237 its reverse (7322225431), we get a palindrome (8667447668).

The spelling of 1345222237 in words is "one billion, three hundred forty-five million, two hundred twenty-two thousand, two hundred thirty-seven".