261823051 has 8 divisors (see below), whose sum is σ = 300116960. Its totient is φ = 223751808.

The previous prime is 261823043. The next prime is 261823109. The reversal of 261823051 is 150328162.

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

It is not a de Polignac number, because 261823051 - 2³ = 261823043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261823351) 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, 53136 + ... + 57853.

It is an arithmetic number, because the mean of its divisors is an integer number (37514620).

Almost surely, 2^261823051 is an apocalyptic number.

261823051 is a deficient number, since it is larger than the sum of its proper divisors (38293909).

261823051 is a wasteful number, since it uses less digits than its factorization.

261823051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111333.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 261823051 is about 16180.9471601634. The cubic root of 261823051 is about 639.7387043694.

The spelling of 261823051 in words is "two hundred sixty-one million, eight hundred twenty-three thousand, fifty-one".