154243157 has 4 divisors (see below), whose sum is σ = 155352960. Its totient is φ = 153133356.

The previous prime is 154243147. The next prime is 154243163. The reversal of 154243157 is 751342451.

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, and also an emirpimes, since its reverse is a distinct semiprime: 751342451 = 25609 ⋅29339.

It is a cyclic number.

It is not a de Polignac number, because 154243157 - 2⁶ = 154243093 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 (154243147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554693 + ... + 554970.

It is an arithmetic number, because the mean of its divisors is an integer number (38838240).

Almost surely, 2^154243157 is an apocalyptic number.

It is an amenable number.

154243157 is a deficient number, since it is larger than the sum of its proper divisors (1109803).

154243157 is a wasteful number, since it uses less digits than its factorization.

154243157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109802.

The product of its digits is 16800, while the sum is 32.

The square root of 154243157 is about 12419.4668565120. The cubic root of 154243157 is about 536.2928026792.

It can be divided in two parts, 15424 and 3157, that added together give a palindrome (18581).

The spelling of 154243157 in words is "one hundred fifty-four million, two hundred forty-three thousand, one hundred fifty-seven".