144981551 has 24 divisors (see below), whose sum is σ = 172658304. Its totient is φ = 120675360.

The previous prime is 144981547. The next prime is 144981563. The reversal of 144981551 is 155189441.

It is a happy number.

144981551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 144981551 - 2² = 144981547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144981541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310220 + ... + 310686.

It is an arithmetic number, because the mean of its divisors is an integer number (7194096).

Almost surely, 2^144981551 is an apocalyptic number.

144981551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

144981551 is a deficient number, since it is larger than the sum of its proper divisors (27676753).

144981551 is a wasteful number, since it uses less digits than its factorization.

144981551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 658 counting only the distinct ones).

The product of its digits is 28800, while the sum is 38.

The square root of 144981551 is about 12040.8285013947. The cubic root of 144981551 is about 525.3365050531.

The spelling of 144981551 in words is "one hundred forty-four million, nine hundred eighty-one thousand, five hundred fifty-one".