154521413 has 4 divisors (see below), whose sum is σ = 157140480. Its totient is φ = 151902348.

The previous prime is 154521407. The next prime is 154521421. The reversal of 154521413 is 314125451.

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 154521413 - 2¹⁸ = 154259269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154521463) 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, 1309445 + ... + 1309562.

It is an arithmetic number, because the mean of its divisors is an integer number (39285120).

Almost surely, 2^154521413 is an apocalyptic number.

It is an amenable number.

154521413 is a deficient number, since it is larger than the sum of its proper divisors (2619067).

154521413 is an equidigital number, since it uses as much as digits as its factorization.

154521413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619066.

The product of its digits is 2400, while the sum is 26.

The square root of 154521413 is about 12430.6642219955. The cubic root of 154521413 is about 536.6151012443.

Adding to 154521413 its reverse (314125451), we get a palindrome (468646864).

The spelling of 154521413 in words is "one hundred fifty-four million, five hundred twenty-one thousand, four hundred thirteen".