151432321 has 4 divisors (see below), whose sum is σ = 151552000. Its totient is φ = 151312644.

The previous prime is 151432273. The next prime is 151432327. The reversal of 151432321 is 123234151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123234151 = 41 ⋅3005711.

It is a cyclic number.

It is not a de Polignac number, because 151432321 - 2¹¹ = 151430273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151432292 and 151432301.

It is not an unprimeable number, because it can be changed into a prime (151432327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57921 + ... + 60478.

It is an arithmetic number, because the mean of its divisors is an integer number (37888000).

Almost surely, 2^151432321 is an apocalyptic number.

It is an amenable number.

151432321 is a deficient number, since it is larger than the sum of its proper divisors (119679).

151432321 is a wasteful number, since it uses less digits than its factorization.

151432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119678.

The product of its digits is 720, while the sum is 22.

The square root of 151432321 is about 12305.7840465368. The cubic root of 151432321 is about 533.0151168995.

Adding to 151432321 its reverse (123234151), we get a palindrome (274666472).

The spelling of 151432321 in words is "one hundred fifty-one million, four hundred thirty-two thousand, three hundred twenty-one".