29113281 has 6 divisors (see below), whose sum is σ = 42052530. Its totient is φ = 19408848.

The previous prime is 29113261. The next prime is 29113291. The reversal of 29113281 is 18231192.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 10112400 = 4359^2 + 3180^2 .

It is not a de Polignac number, because 29113281 - 2⁷ = 29113153 is a prime.

It is a super-2 number, since 2×29113281² = 1695166261169922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29113211) 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, 1617396 + ... + 1617413.

It is an arithmetic number, because the mean of its divisors is an integer number (7008755).

Almost surely, 2^29113281 is an apocalyptic number.

It is an amenable number.

29113281 is a deficient number, since it is larger than the sum of its proper divisors (12939249).

29113281 is a wasteful number, since it uses less digits than its factorization.

29113281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234815 (or 3234812 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 29113281 is about 5395.6724326075. The cubic root of 29113281 is about 307.6312031818.

The spelling of 29113281 in words is "twenty-nine million, one hundred thirteen thousand, two hundred eighty-one".