151821234 has 12 divisors (see below), whose sum is σ = 328946046. Its totient is φ = 50607072.

The previous prime is 151821227. The next prime is 151821259. The reversal of 151821234 is 432128151.

It can be written as a sum of positive squares in only one way, i.e., 136960209 + 14861025 = 11703^2 + 3855^2 .

It is a junction number, because it is equal to n+sod(n) for n = 151821198 and 151821207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4217239 + ... + 4217274.

Almost surely, 2^151821234 is an apocalyptic number.

151821234 is an abundant number, since it is smaller than the sum of its proper divisors (177124812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151821234 is a wasteful number, since it uses less digits than its factorization.

151821234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8434521 (or 8434518 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 151821234 is about 12321.5759543980. The cubic root of 151821234 is about 533.4710285963.

Adding to 151821234 its reverse (432128151), we get a palindrome (583949385).

The spelling of 151821234 in words is "one hundred fifty-one million, eight hundred twenty-one thousand, two hundred thirty-four".