1156213023 has 32 divisors (see below), whose sum is σ = 1860057600. Its totient is φ = 624070656.

The previous prime is 1156213021. The next prime is 1156213043. The reversal of 1156213023 is 3203126511.

It is not a de Polignac number, because 1156213023 - 2¹ = 1156213021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156212984 and 1156213002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156213021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136743 + ... + 144951.

It is an arithmetic number, because the mean of its divisors is an integer number (58126800).

Almost surely, 2^1156213023 is an apocalyptic number.

1156213023 is a deficient number, since it is larger than the sum of its proper divisors (703844577).

1156213023 is a wasteful number, since it uses less digits than its factorization.

1156213023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1156213023 is about 34003.1325468699. The cubic root of 1156213023 is about 1049.5729247284.

Adding to 1156213023 its reverse (3203126511), we get a palindrome (4359339534).

The spelling of 1156213023 in words is "one billion, one hundred fifty-six million, two hundred thirteen thousand, twenty-three".