261153233 has 16 divisors (see below), whose sum is σ = 306873600. Its totient is φ = 219678480.

The previous prime is 261153227. The next prime is 261153239. The reversal of 261153233 is 332351162.

261153233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (261153227) and next prime (261153239).

It is a cyclic number.

It is not a de Polignac number, because 261153233 - 2¹⁴ = 261136849 is a prime.

It is a super-2 number, since 2×261153233² = 136402022212704578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261153239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5543 + ... + 23516.

It is an arithmetic number, because the mean of its divisors is an integer number (19179600).

Almost surely, 2^261153233 is an apocalyptic number.

It is an amenable number.

261153233 is a deficient number, since it is larger than the sum of its proper divisors (45720367).

261153233 is a wasteful number, since it uses less digits than its factorization.

261153233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29132.

The product of its digits is 3240, while the sum is 26.

The square root of 261153233 is about 16160.2361678287. The cubic root of 261153233 is about 639.1926938307.

The spelling of 261153233 in words is "two hundred sixty-one million, one hundred fifty-three thousand, two hundred thirty-three".