261227770331 has 8 divisors (see below), whose sum is σ = 284983469424. Its totient is φ = 237473357920.

The previous prime is 261227770313. The next prime is 261227770369. The reversal of 261227770331 is 133077722162.

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 261227770331 - 2¹⁴ = 261227753947 is a prime.

It is a super-2 number, since 2×261227770331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261227770301) 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, 130481 + ... + 734493.

It is an arithmetic number, because the mean of its divisors is an integer number (35622933678).

Almost surely, 2^261227770331 is an apocalyptic number.

261227770331 is a deficient number, since it is larger than the sum of its proper divisors (23755699093).

261227770331 is a wasteful number, since it uses less digits than its factorization.

261227770331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643341.

The product of its (nonzero) digits is 148176, while the sum is 41.

The spelling of 261227770331 in words is "two hundred sixty-one billion, two hundred twenty-seven million, seven hundred seventy thousand, three hundred thirty-one".