151223231 has 2 divisors, whose sum is σ = 151223232. Its totient is φ = 151223230.

The previous prime is 151223227. The next prime is 151223249. The reversal of 151223231 is 132322151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151223231 - 2² = 151223227 is a prime.

It is a super-2 number, since 2×151223231² = 45736931188158722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151223201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75611615 + 75611616.

It is an arithmetic number, because the mean of its divisors is an integer number (75611616).

Almost surely, 2^151223231 is an apocalyptic number.

151223231 is a deficient number, since it is larger than the sum of its proper divisors (1).

151223231 is an equidigital number, since it uses as much as digits as its factorization.

151223231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 151223231 is about 12297.2855134782. The cubic root of 151223231 is about 532.7696839048.

Adding to 151223231 its reverse (132322151), we get a palindrome (283545382).

The spelling of 151223231 in words is "one hundred fifty-one million, two hundred twenty-three thousand, two hundred thirty-one".