261622423 has 8 divisors (see below), whose sum is σ = 270426240. Its totient is φ = 252841440.

The previous prime is 261622409. The next prime is 261622453. The reversal of 261622423 is 324226162.

261622423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261622423 - 2²¹ = 259525271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261622391 and 261622400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261622453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19413 + ... + 30001.

It is an arithmetic number, because the mean of its divisors is an integer number (33803280).

Almost surely, 2^261622423 is an apocalyptic number.

261622423 is a deficient number, since it is larger than the sum of its proper divisors (8803817).

261622423 is a wasteful number, since it uses less digits than its factorization.

261622423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11417.

The product of its digits is 6912, while the sum is 28.

The square root of 261622423 is about 16174.7464586002. The cubic root of 261622423 is about 639.5752577288.

Adding to 261622423 its reverse (324226162), we get a palindrome (585848585).

The spelling of 261622423 in words is "two hundred sixty-one million, six hundred twenty-two thousand, four hundred twenty-three".