155023453 has 4 divisors (see below), whose sum is σ = 166948348. Its totient is φ = 143098560.

The previous prime is 155023447. The next prime is 155023483. The reversal of 155023453 is 354320551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354320551 = 13 ⋅27255427.

It can be written as a sum of positive squares in 2 ways, for example, as 48066489 + 106956964 = 6933^2 + 10342^2 .

It is a cyclic number.

It is not a de Polignac number, because 155023453 - 2⁹ = 155022941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155023483) 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, 5962428 + ... + 5962453.

It is an arithmetic number, because the mean of its divisors is an integer number (41737087).

Almost surely, 2^155023453 is an apocalyptic number.

155023453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155023453 is a deficient number, since it is larger than the sum of its proper divisors (11924895).

155023453 is a wasteful number, since it uses less digits than its factorization.

155023453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11924894.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 155023453 is about 12450.8414575080. The cubic root of 155023453 is about 537.1956270607.

The spelling of 155023453 in words is "one hundred fifty-five million, twenty-three thousand, four hundred fifty-three".