155603453 has 2 divisors, whose sum is σ = 155603454. Its totient is φ = 155603452.

The previous prime is 155603443. The next prime is 155603471. The reversal of 155603453 is 354306551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78198649 + 77404804 = 8843^2 + 8798^2 .

It is a cyclic number.

It is not a de Polignac number, because 155603453 - 2¹² = 155599357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155603443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77801726 + 77801727.

It is an arithmetic number, because the mean of its divisors is an integer number (77801727).

Almost surely, 2^155603453 is an apocalyptic number.

It is an amenable number.

155603453 is a deficient number, since it is larger than the sum of its proper divisors (1).

155603453 is an equidigital number, since it uses as much as digits as its factorization.

155603453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 155603453 is about 12474.1113110313. Note that the first 3 decimals coincide. The cubic root of 155603453 is about 537.8647423738.

The spelling of 155603453 in words is "one hundred fifty-five million, six hundred three thousand, four hundred fifty-three".