1155551023 has 24 divisors (see below), whose sum is σ = 1320464880. Its totient is φ = 1001656320.

The previous prime is 1155551017. The next prime is 1155551051. The reversal of 1155551023 is 3201555511.

It is not a de Polignac number, because 1155551023 - 2¹³ = 1155542831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1155550982 and 1155551000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155551003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5987215 + ... + 5987407.

It is an arithmetic number, because the mean of its divisors is an integer number (55019370).

Almost surely, 2^1155551023 is an apocalyptic number.

1155551023 is a deficient number, since it is larger than the sum of its proper divisors (164913857).

1155551023 is a wasteful number, since it uses less digits than its factorization.

1155551023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 1155551023 is about 33993.3967558407. The cubic root of 1155551023 is about 1049.3725723964.

The spelling of 1155551023 in words is "one billion, one hundred fifty-five million, five hundred fifty-one thousand, twenty-three".