155057 has 8 divisors (see below), whose sum is σ = 187776. Its totient is φ = 124992.

The previous prime is 155047. The next prime is 155069. The reversal of 155057 is 750551.

155057 = T₇₈ + T₇₉ + ... + T₁₁₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155057 - 2¹² = 150961 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (23472).

2¹⁵⁵⁰⁵⁷ is an apocalyptic number.

155057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

155057 is a deficient number, since it is larger than the sum of its proper divisors (32719).

155057 is a wasteful number, since it uses less digits than its factorization.

155057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

The product of its (nonzero) digits is 875, while the sum is 23.

The square root of 155057 is about 393.7727771190. The cubic root of 155057 is about 53.7234373890.

It can be divided in two parts, 15 and 5057, that multiplied together give a triangular number (75855 = T₃₈₉).

The spelling of 155057 in words is "one hundred fifty-five thousand, fifty-seven".