921013151 has 4 divisors (see below), whose sum is σ = 921314400. Its totient is φ = 920711904.

The previous prime is 921013147. The next prime is 921013153. The reversal of 921013151 is 151310129.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 921013151 - 2² = 921013147 is a prime.

It is a Duffinian number.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921013153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145991 + ... + 152168.

It is an arithmetic number, because the mean of its divisors is an integer number (230328600).

Almost surely, 2^921013151 is an apocalyptic number.

921013151 is a deficient number, since it is larger than the sum of its proper divisors (301249).

921013151 is a wasteful number, since it uses less digits than its factorization.

921013151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301248.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 921013151 is about 30348.1984803052. The cubic root of 921013151 is about 972.9457167429.

The spelling of 921013151 in words is "nine hundred twenty-one million, thirteen thousand, one hundred fifty-one".