155242259 has 2 divisors, whose sum is σ = 155242260. Its totient is φ = 155242258.

The previous prime is 155242237. The next prime is 155242271. The reversal of 155242259 is 952242551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155242259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155242229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77621129 + 77621130.

It is an arithmetic number, because the mean of its divisors is an integer number (77621130).

Almost surely, 2^155242259 is an apocalyptic number.

155242259 is a deficient number, since it is larger than the sum of its proper divisors (1).

155242259 is an equidigital number, since it uses as much as digits as its factorization.

155242259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 155242259 is about 12459.6251548752. The cubic root of 155242259 is about 537.4482476944.

The spelling of 155242259 in words is "one hundred fifty-five million, two hundred forty-two thousand, two hundred fifty-nine".