144615557 has 2 divisors, whose sum is σ = 144615558. Its totient is φ = 144615556.

The previous prime is 144615551. The next prime is 144615577. The reversal of 144615557 is 755516441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113188321 + 31427236 = 10639^2 + 5606^2 .

It is an emirp because it is prime and its reverse (755516441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144615557 - 2¹⁴ = 144599173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144615557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144615551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72307778 + 72307779.

It is an arithmetic number, because the mean of its divisors is an integer number (72307779).

Almost surely, 2^144615557 is an apocalyptic number.

It is an amenable number.

144615557 is a deficient number, since it is larger than the sum of its proper divisors (1).

144615557 is an equidigital number, since it uses as much as digits as its factorization.

144615557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 144615557 is about 12025.6208571533. The cubic root of 144615557 is about 524.8940762872.

The spelling of 144615557 in words is "one hundred forty-four million, six hundred fifteen thousand, five hundred fifty-seven".