154445131 has 4 divisors (see below), whose sum is σ = 159427264. Its totient is φ = 149463000.

The previous prime is 154445111. The next prime is 154445143. The reversal of 154445131 is 131544451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 154445131 - 2⁵ = 154445099 is a prime.

It is a super-2 number, since 2×154445131² = 47706596979214322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154445131.

It is not an unprimeable number, because it can be changed into a prime (154445111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2491020 + ... + 2491081.

It is an arithmetic number, because the mean of its divisors is an integer number (39856816).

Almost surely, 2^154445131 is an apocalyptic number.

154445131 is a deficient number, since it is larger than the sum of its proper divisors (4982133).

154445131 is an equidigital number, since it uses as much as digits as its factorization.

154445131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982132.

The product of its digits is 4800, while the sum is 28.

The square root of 154445131 is about 12427.5955437888. The cubic root of 154445131 is about 536.5267837955.

Adding to 154445131 its reverse (131544451), we get a palindrome (285989582).

The spelling of 154445131 in words is "one hundred fifty-four million, four hundred forty-five thousand, one hundred thirty-one".