154247481 has 6 divisors (see below), whose sum is σ = 222801930. Its totient is φ = 102831648.

The previous prime is 154247473. The next prime is 154247497. The reversal of 154247481 is 184742451.

It is a happy number.

154247481 is a `hidden beast` number, since 154 + 24 + 7 + 481 = 666.

154247481 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in only one way, i.e., 134931456 + 19316025 = 11616^2 + 4395^2 .

It is not a de Polignac number, because 154247481 - 2³ = 154247473 is a prime.

It is a super-2 number, since 2×154247481² = 47584570789690722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (154247441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8569296 + ... + 8569313.

It is an arithmetic number, because the mean of its divisors is an integer number (37133655).

Almost surely, 2^154247481 is an apocalyptic number.

It is an amenable number.

154247481 is a deficient number, since it is larger than the sum of its proper divisors (68554449).

154247481 is a wasteful number, since it uses less digits than its factorization.

154247481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17138615 (or 17138612 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 154247481 is about 12419.6409368387. The cubic root of 154247481 is about 536.2978140488.

The spelling of 154247481 in words is "one hundred fifty-four million, two hundred forty-seven thousand, four hundred eighty-one".