151212231 has 8 divisors (see below), whose sum is σ = 224018160. Its totient is φ = 100808136.

The previous prime is 151212227. The next prime is 151212253. The reversal of 151212231 is 132212151.

151212231 is a `hidden beast` number, since 1 + 512 + 122 + 31 = 666.

It is not a de Polignac number, because 151212231 - 2² = 151212227 is a prime.

It is a super-2 number, since 2×151212231² = 45730277607994722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151212031) 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 7 ways as a sum of consecutive naturals, for example, 2800200 + ... + 2800253.

It is an arithmetic number, because the mean of its divisors is an integer number (28002270).

Almost surely, 2^151212231 is an apocalyptic number.

151212231 is a deficient number, since it is larger than the sum of its proper divisors (72805929).

151212231 is an equidigital number, since it uses as much as digits as its factorization.

151212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600462 (or 5600456 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 151212231 is about 12296.8382521687. The cubic root of 151212231 is about 532.7567656765.

Adding to 151212231 its reverse (132212151), we get a palindrome (283424382).

It can be divided in two parts, 15 and 1212231, that multiplied together give a triangular number (18183465 = T₆₀₃₀).

The spelling of 151212231 in words is "one hundred fifty-one million, two hundred twelve thousand, two hundred thirty-one".