155622553 has 2 divisors, whose sum is σ = 155622554. Its totient is φ = 155622552.

The previous prime is 155622527. The next prime is 155622581. The reversal of 155622553 is 355226551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147938569 + 7683984 = 12163^2 + 2772^2 .

It is a cyclic number.

It is not a de Polignac number, because 155622553 - 2¹⁷ = 155491481 is a prime.

It is not a weakly prime, because it can be changed into another prime (155622503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77811276 + 77811277.

It is an arithmetic number, because the mean of its divisors is an integer number (77811277).

Almost surely, 2^155622553 is an apocalyptic number.

It is an amenable number.

155622553 is a deficient number, since it is larger than the sum of its proper divisors (1).

155622553 is an equidigital number, since it uses as much as digits as its factorization.

155622553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45000, while the sum is 34.

The square root of 155622553 is about 12474.8768731399. The cubic root of 155622553 is about 537.8867487327.

The spelling of 155622553 in words is "one hundred fifty-five million, six hundred twenty-two thousand, five hundred fifty-three".