155346091 has 4 divisors (see below), whose sum is σ = 159544672. Its totient is φ = 151147512.

The previous prime is 155346067. The next prime is 155346101. The reversal of 155346091 is 190643551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190643551 = 7 ⋅27234793.

It is a cyclic number.

It is not a de Polignac number, because 155346091 - 2¹¹ = 155344043 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (155346491) 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, 2099235 + ... + 2099308.

It is an arithmetic number, because the mean of its divisors is an integer number (39886168).

Almost surely, 2^155346091 is an apocalyptic number.

155346091 is a deficient number, since it is larger than the sum of its proper divisors (4198581).

155346091 is an equidigital number, since it uses as much as digits as its factorization.

155346091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198580.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 155346091 is about 12463.7911969031. The cubic root of 155346091 is about 537.5680430175.

It can be divided in two parts, 1553460 and 91, that added together give a palindrome (1553551).

The spelling of 155346091 in words is "one hundred fifty-five million, three hundred forty-six thousand, ninety-one".