144615551 has 2 divisors, whose sum is σ = 144615552. Its totient is φ = 144615550.

The previous prime is 144615539. The next prime is 144615557. The reversal of 144615551 is 155516441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144615551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144615557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72307775 + 72307776.

It is an arithmetic number, because the mean of its divisors is an integer number (72307776).

Almost surely, 2^144615551 is an apocalyptic number.

144615551 is a deficient number, since it is larger than the sum of its proper divisors (1).

144615551 is an equidigital number, since it uses as much as digits as its factorization.

144615551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 32.

The square root of 144615551 is about 12025.6206076859. The cubic root of 144615551 is about 524.8940690280.

The spelling of 144615551 in words is "one hundred forty-four million, six hundred fifteen thousand, five hundred fifty-one".