151843921 has 8 divisors (see below), whose sum is σ = 157316864. Its totient is φ = 146406960.

The previous prime is 151843919. The next prime is 151843931. The reversal of 151843921 is 129348151.

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 151843921 - 2¹ = 151843919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151843931) 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, 255 + ... + 17428.

It is an arithmetic number, because the mean of its divisors is an integer number (19664608).

Almost surely, 2^151843921 is an apocalyptic number.

It is an amenable number.

151843921 is a deficient number, since it is larger than the sum of its proper divisors (5472943).

151843921 is a wasteful number, since it uses less digits than its factorization.

151843921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17991.

The product of its digits is 8640, while the sum is 34.

The square root of 151843921 is about 12322.4965408800. The cubic root of 151843921 is about 533.4975998782.

The spelling of 151843921 in words is "one hundred fifty-one million, eight hundred forty-three thousand, nine hundred twenty-one".