261322050 has 96 divisors (see below), whose sum is σ = 713972160. Its totient is φ = 62726400.

The previous prime is 261322037. The next prime is 261322057. The reversal of 261322050 is 50223162.

261322050 = T₂₁₃₅ + T₂₁₃₆ + ... + T₂₂₄₃.

It is not an unprimeable number, because it can be changed into a prime (261322057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179124 + ... + 180576.

It is an arithmetic number, because the mean of its divisors is an integer number (7437210).

Almost surely, 2^261322050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261322050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356986080).

261322050 is an abundant number, since it is smaller than the sum of its proper divisors (452650110).

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

261322050 is a wasteful number, since it uses less digits than its factorization.

261322050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 261322050 is about 16165.4585459244. The cubic root of 261322050 is about 639.3303950426.

It can be divided in two parts, 26132 and 2050, that added together give a palindrome (28182).

The spelling of 261322050 in words is "two hundred sixty-one million, three hundred twenty-two thousand, fifty".