155361 has 4 divisors (see below), whose sum is σ = 207152. Its totient is φ = 103572.

The previous prime is 155333. The next prime is 155371. The reversal of 155361 is 163551.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 163551 = 3 ⋅54517.

It is not a de Polignac number, because 155361 - 2⁹ = 154849 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155361.

It is not an unprimeable number, because it can be changed into a prime (155371) 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, 25891 + ... + 25896.

It is an arithmetic number, because the mean of its divisors is an integer number (51788).

2¹⁵⁵³⁶¹ is an apocalyptic number.

It is an amenable number.

155361 is a deficient number, since it is larger than the sum of its proper divisors (51791).

155361 is an equidigital number, since it uses as much as digits as its factorization.

155361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51790.

The product of its digits is 450, while the sum is 21.

The square root of 155361 is about 394.1585975214. The cubic root of 155361 is about 53.7585239772.

It can be divided in two parts, 155 and 361, that multiplied together give a palindrome (55955).

The spelling of 155361 in words is "one hundred fifty-five thousand, three hundred sixty-one".