151340221 has 8 divisors (see below), whose sum is σ = 153843200. Its totient is φ = 148852080.

The previous prime is 151340209. The next prime is 151340261. The reversal of 151340221 is 122043151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 151340221 - 2⁹ = 151339709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151340261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17875 + ... + 24943.

It is an arithmetic number, because the mean of its divisors is an integer number (19230400).

Almost surely, 2^151340221 is an apocalyptic number.

It is an amenable number.

151340221 is a deficient number, since it is larger than the sum of its proper divisors (2502979).

151340221 is an equidigital number, since it uses as much as digits as its factorization.

151340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7419.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 151340221 is about 12302.0413346729. The cubic root of 151340221 is about 532.9070363887.

Adding to 151340221 its reverse (122043151), we get a palindrome (273383372).

The spelling of 151340221 in words is "one hundred fifty-one million, three hundred forty thousand, two hundred twenty-one".