261215153032 has 8 divisors (see below), whose sum is σ = 489778411950. Its totient is φ = 130607576512.

The previous prime is 261215152999. The next prime is 261215153033. The reversal of 261215153032 is 230351512162.

261215153032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 260718487236 + 496665796 = 510606^2 + 22286^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 261215152985 and 261215153003.

It is not an unprimeable number, because it can be changed into a prime (261215153033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16325947057 + ... + 16325947072.

Almost surely, 2^261215153032 is an apocalyptic number.

It is an amenable number.

261215153032 is a deficient number, since it is larger than the sum of its proper divisors (228563258918).

261215153032 is a wasteful number, since it uses less digits than its factorization.

261215153032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32651894135 (or 32651894131 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 261215153032 its reverse (230351512162), we get a palindrome (491566665194).

The spelling of 261215153032 in words is "two hundred sixty-one billion, two hundred fifteen million, one hundred fifty-three thousand, thirty-two".