155052020 has 12 divisors (see below), whose sum is σ = 325609284. Its totient is φ = 62020800.

The previous prime is 155052011. The next prime is 155052031. The reversal of 155052020 is 20250551.

It can be written as a sum of positive squares in 2 ways, for example, as 21325924 + 133726096 = 4618^2 + 11564^2 .

It is a super-2 number, since 2×155052020² = 48082257812160800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 7752601 = 155052020 / (1 + 5 + 5 + 0 + 5 + 2 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 155051983 and 155052001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3876281 + ... + 3876320.

It is an arithmetic number, because the mean of its divisors is an integer number (27134107).

Almost surely, 2^155052020 is an apocalyptic number.

155052020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155052020 is an abundant number, since it is smaller than the sum of its proper divisors (170557264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155052020 is a wasteful number, since it uses less digits than its factorization.

155052020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752610 (or 7752608 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 155052020 is about 12451.9885962042. The cubic root of 155052020 is about 537.2286223369.

The spelling of 155052020 in words is "one hundred fifty-five million, fifty-two thousand, twenty".