154755521 has 4 divisors (see below), whose sum is σ = 155780544. Its totient is φ = 153730500.

The previous prime is 154755493. The next prime is 154755541. The reversal of 154755521 is 125557451.

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 154755521 - 2⁶ = 154755457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154755541) 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, 512285 + ... + 512586.

It is an arithmetic number, because the mean of its divisors is an integer number (38945136).

Almost surely, 2^154755521 is an apocalyptic number.

It is an amenable number.

154755521 is a deficient number, since it is larger than the sum of its proper divisors (1025023).

154755521 is a wasteful number, since it uses less digits than its factorization.

154755521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025022.

The product of its digits is 35000, while the sum is 35.

The square root of 154755521 is about 12440.0772103713. The cubic root of 154755521 is about 536.8859644551.

The spelling of 154755521 in words is "one hundred fifty-four million, seven hundred fifty-five thousand, five hundred twenty-one".