151323231 has 4 divisors (see below), whose sum is σ = 201764312. Its totient is φ = 100882152.

The previous prime is 151323217. The next prime is 151323269. The reversal of 151323231 is 132323151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132323151 = 3 ⋅44107717.

It is not a de Polignac number, because 151323231 - 2²⁶ = 84214367 is a prime.

It is a super-2 number, since 2×151323231² = 45797440480558722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151323198 and 151323207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151323281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25220536 + ... + 25220541.

It is an arithmetic number, because the mean of its divisors is an integer number (50441078).

Almost surely, 2^151323231 is an apocalyptic number.

151323231 is a deficient number, since it is larger than the sum of its proper divisors (50441081).

151323231 is an equidigital number, since it uses as much as digits as its factorization.

151323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50441080.

The product of its digits is 540, while the sum is 21.

The square root of 151323231 is about 12301.3507794876. The cubic root of 151323231 is about 532.8870936193.

Adding to 151323231 its reverse (132323151), we get a palindrome (283646382).

The spelling of 151323231 in words is "one hundred fifty-one million, three hundred twenty-three thousand, two hundred thirty-one".