261010051 has 6 divisors (see below), whose sum is σ = 262015980. Its totient is φ = 260007948.

The previous prime is 261010039. The next prime is 261010069. The reversal of 261010051 is 150010162.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-261010051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261010081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78460 + ... + 81718.

It is an arithmetic number, because the mean of its divisors is an integer number (43669330).

Almost surely, 2^261010051 is an apocalyptic number.

261010051 is a deficient number, since it is larger than the sum of its proper divisors (1005929).

261010051 is an frugal number, since it uses more digits than its factorization.

261010051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825 (or 3542 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 261010051 is about 16155.8054890494. The cubic root of 261010051 is about 639.0758561433.

The spelling of 261010051 in words is "two hundred sixty-one million, ten thousand, fifty-one".