144557551 has 4 divisors (see below), whose sum is σ = 144594072. Its totient is φ = 144521032.

The previous prime is 144557537. The next prime is 144557573. The reversal of 144557551 is 155755441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155755441 = 109 ⋅1428949.

It is a cyclic number.

It is not a de Polignac number, because 144557551 - 2⁵ = 144557519 is a prime.

It is a super-2 number, since 2×144557551² = 41793771102235202, 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 144557551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144557521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11485 + ... + 20518.

It is an arithmetic number, because the mean of its divisors is an integer number (36148518).

Almost surely, 2^144557551 is an apocalyptic number.

144557551 is a deficient number, since it is larger than the sum of its proper divisors (36521).

144557551 is an equidigital number, since it uses as much as digits as its factorization.

144557551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36520.

The product of its digits is 70000, while the sum is 37.

The square root of 144557551 is about 12023.2088478908. The cubic root of 144557551 is about 524.8238877170.

It can be divided in two parts, 1445 and 57551, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 144557551 in words is "one hundred forty-four million, five hundred fifty-seven thousand, five hundred fifty-one".