154462221 has 48 divisors (see below), whose sum is σ = 247665600. Its totient is φ = 95862528.

The previous prime is 154462201. The next prime is 154462247. The reversal of 154462221 is 122264451.

154462221 is a `hidden beast` number, since 15 + 4 + 4 + 622 + 21 = 666.

It is not a de Polignac number, because 154462221 - 2⁹ = 154461709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154462201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 574075 + ... + 574343.

It is an arithmetic number, because the mean of its divisors is an integer number (5159700).

Almost surely, 2^154462221 is an apocalyptic number.

It is an amenable number.

154462221 is a deficient number, since it is larger than the sum of its proper divisors (93203379).

154462221 is a wasteful number, since it uses less digits than its factorization.

154462221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 428 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 154462221 is about 12428.2831074932. The cubic root of 154462221 is about 536.5465727102.

The spelling of 154462221 in words is "one hundred fifty-four million, four hundred sixty-two thousand, two hundred twenty-one".