145732229 has 2 divisors, whose sum is σ = 145732230. Its totient is φ = 145732228.

The previous prime is 145732201. The next prime is 145732231. The reversal of 145732229 is 922237541.

It is a happy number.

145732229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134328100 + 11404129 = 11590^2 + 3377^2 .

It is an emirp because it is prime and its reverse (922237541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145732229 is a prime.

Together with 145732231, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145732429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72866114 + 72866115.

It is an arithmetic number, because the mean of its divisors is an integer number (72866115).

Almost surely, 2^145732229 is an apocalyptic number.

It is an amenable number.

145732229 is a deficient number, since it is larger than the sum of its proper divisors (1).

145732229 is an equidigital number, since it uses as much as digits as its factorization.

145732229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 145732229 is about 12071.9604455946. The cubic root of 145732229 is about 526.2416314307.

The spelling of 145732229 in words is "one hundred forty-five million, seven hundred thirty-two thousand, two hundred twenty-nine".