155784053 has 4 divisors (see below), whose sum is σ = 155814720. Its totient is φ = 155753388.

The previous prime is 155784049. The next prime is 155784061. The reversal of 155784053 is 350487551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155784053 - 2² = 155784049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155783998 and 155784016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155784253) 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 in 3 ways as a sum of consecutive naturals, for example, 5693 + ... + 18546.

It is an arithmetic number, because the mean of its divisors is an integer number (38953680).

Almost surely, 2^155784053 is an apocalyptic number.

It is an amenable number.

155784053 is a deficient number, since it is larger than the sum of its proper divisors (30667).

155784053 is an equidigital number, since it uses as much as digits as its factorization.

155784053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30666.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 155784053 is about 12481.3482044209. The cubic root of 155784053 is about 538.0727515018.

The spelling of 155784053 in words is "one hundred fifty-five million, seven hundred eighty-four thousand, fifty-three".