261033030 has 112 divisors (see below), whose sum is σ = 717235344. Its totient is φ = 68351040.

The previous prime is 261033013. The next prime is 261033043. The reversal of 261033030 is 30330162.

It is a happy number.

261033030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 261032994 and 261033012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 444397 + ... + 444983.

It is an arithmetic number, because the mean of its divisors is an integer number (6403887).

Almost surely, 2^261033030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261033030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358617672).

261033030 is an abundant number, since it is smaller than the sum of its proper divisors (456202314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261033030 is an equidigital number, since it uses as much as digits as its factorization.

261033030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 261033030 is about 16156.5166419003. The cubic root of 261033030 is about 639.0946100739.

Adding to 261033030 its reverse (30330162), we get a palindrome (291363192).

The spelling of 261033030 in words is "two hundred sixty-one million, thirty-three thousand, thirty".