155238683 has 4 divisors (see below), whose sum is σ = 163409160. Its totient is φ = 147068208.

The previous prime is 155238649. The next prime is 155238689. The reversal of 155238683 is 386832551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 386832551 = 7 ⋅55261793.

It is not a de Polignac number, because 155238683 - 2⁸ = 155238427 is a prime.

It is a super-4 number, since 4×155238683⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155238683.

It is not an unprimeable number, because it can be changed into a prime (155238689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4085210 + ... + 4085247.

It is an arithmetic number, because the mean of its divisors is an integer number (40852290).

Almost surely, 2^155238683 is an apocalyptic number.

155238683 is a deficient number, since it is larger than the sum of its proper divisors (8170477).

155238683 is an equidigital number, since it uses as much as digits as its factorization.

155238683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170476.

The product of its digits is 172800, while the sum is 41.

The square root of 155238683 is about 12459.4816505343. The cubic root of 155238683 is about 537.4441209622. Note that the first 3 decimals are identical.

The spelling of 155238683 in words is "one hundred fifty-five million, two hundred thirty-eight thousand, six hundred eighty-three".