19116261 has 12 divisors (see below), whose sum is σ = 29065920. Its totient is φ = 12073320.

The previous prime is 19116257. The next prime is 19116269. The reversal of 19116261 is 16261191.

It is not a de Polignac number, because 19116261 - 2² = 19116257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19116269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55725 + ... + 56066.

It is an arithmetic number, because the mean of its divisors is an integer number (2422160).

Almost surely, 2^19116261 is an apocalyptic number.

It is an amenable number.

19116261 is a deficient number, since it is larger than the sum of its proper divisors (9949659).

19116261 is a wasteful number, since it uses less digits than its factorization.

19116261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111816 (or 111813 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 19116261 is about 4372.2146562126. The cubic root of 19116261 is about 267.3833235011.

The spelling of 19116261 in words is "nineteen million, one hundred sixteen thousand, two hundred sixty-one".