155043553 has 32 divisors (see below), whose sum is σ = 201830400. Its totient is φ = 115893504.

The previous prime is 155043547. The next prime is 155043557. The reversal of 155043553 is 355340551.

It is a 9-Lehmer number, since φ(155043553) divides (155043553-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 155043553 - 2²¹ = 152946401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155043557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105538 + ... + 106996.

It is an arithmetic number, because the mean of its divisors is an integer number (6307200).

Almost surely, 2^155043553 is an apocalyptic number.

It is an amenable number.

155043553 is a deficient number, since it is larger than the sum of its proper divisors (46786847).

155043553 is a wasteful number, since it uses less digits than its factorization.

155043553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 155043553 is about 12451.6486057068. The cubic root of 155043553 is about 537.2188432586.

The spelling of 155043553 in words is "one hundred fifty-five million, forty-three thousand, five hundred fifty-three".