1356155023 has 4 divisors (see below), whose sum is σ = 1356705000. Its totient is φ = 1355605048.

The previous prime is 1356154993. The next prime is 1356155057. The reversal of 1356155023 is 3205516531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3205516531 = 7 ⋅457930933.

It is a cyclic number.

It is not a de Polignac number, because 1356155023 - 2¹⁷ = 1356023951 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 (1356156023) 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, 271273 + ... + 276226.

It is an arithmetic number, because the mean of its divisors is an integer number (339176250).

Almost surely, 2^1356155023 is an apocalyptic number.

1356155023 is a deficient number, since it is larger than the sum of its proper divisors (549977).

1356155023 is an equidigital number, since it uses as much as digits as its factorization.

1356155023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549976.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 1356155023 is about 36826.0101422894. The cubic root of 1356155023 is about 1106.8865551214.

The spelling of 1356155023 in words is "one billion, three hundred fifty-six million, one hundred fifty-five thousand, twenty-three".