152911921 has 4 divisors (see below), whose sum is σ = 153017344. Its totient is φ = 152806500.

The previous prime is 152911909. The next prime is 152911951. The reversal of 152911921 is 129119251.

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.

It is a cyclic number.

It is not a de Polignac number, because 152911921 - 2¹¹ = 152909873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152911901) 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, 50505 + ... + 53446.

It is an arithmetic number, because the mean of its divisors is an integer number (38254336).

Almost surely, 2^152911921 is an apocalyptic number.

It is an amenable number.

152911921 is a deficient number, since it is larger than the sum of its proper divisors (105423).

152911921 is a wasteful number, since it uses less digits than its factorization.

152911921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105422.

The product of its digits is 1620, while the sum is 31.

The square root of 152911921 is about 12365.7559817425. The cubic root of 152911921 is about 534.7454706802.

The spelling of 152911921 in words is "one hundred fifty-two million, nine hundred eleven thousand, nine hundred twenty-one".