155219093 has 2 divisors, whose sum is σ = 155219094. Its totient is φ = 155219092.

The previous prime is 155219087. The next prime is 155219117. The reversal of 155219093 is 390912551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78446449 + 76772644 = 8857^2 + 8762^2 .

It is a cyclic number.

It is not a de Polignac number, because 155219093 - 2²⁶ = 88110229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155219063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77609546 + 77609547.

It is an arithmetic number, because the mean of its divisors is an integer number (77609547).

Almost surely, 2^155219093 is an apocalyptic number.

It is an amenable number.

155219093 is a deficient number, since it is larger than the sum of its proper divisors (1).

155219093 is an equidigital number, since it uses as much as digits as its factorization.

155219093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 155219093 is about 12458.6954774567. The cubic root of 155219093 is about 537.4215128230.

The spelling of 155219093 in words is "one hundred fifty-five million, two hundred nineteen thousand, ninety-three".