145221233237 has 2 divisors, whose sum is σ = 145221233238. Its totient is φ = 145221233236.

The previous prime is 145221233123. The next prime is 145221233273. The reversal of 145221233237 is 732332122541.

Together with next prime (145221233273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122747925316 + 22473307921 = 350354^2 + 149911^2 .

It is a cyclic number.

It is not a de Polignac number, because 145221233237 - 2¹⁴ = 145221216853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145221233197 and 145221233206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145221239237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72610616618 + 72610616619.

It is an arithmetic number, because the mean of its divisors is an integer number (72610616619).

Almost surely, 2^145221233237 is an apocalyptic number.

It is an amenable number.

145221233237 is a deficient number, since it is larger than the sum of its proper divisors (1).

145221233237 is an equidigital number, since it uses as much as digits as its factorization.

145221233237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

Adding to 145221233237 its reverse (732332122541), we get a palindrome (877553355778).

The spelling of 145221233237 in words is "one hundred forty-five billion, two hundred twenty-one million, two hundred thirty-three thousand, two hundred thirty-seven".