29801561 has 8 divisors (see below), whose sum is σ = 31910760. Its totient is φ = 27731968.

The previous prime is 29801449. The next prime is 29801567. The reversal of 29801561 is 16510892.

It can be written as a sum of positive squares in 4 ways, for example, as 846400 + 28955161 = 920^2 + 5381^2 .

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 29801561 - 2¹⁴ = 29785177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29801567) 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, 8336 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (3988845).

Almost surely, 2^29801561 is an apocalyptic number.

It is an amenable number.

29801561 is a deficient number, since it is larger than the sum of its proper divisors (2109199).

29801561 is a wasteful number, since it uses less digits than its factorization.

29801561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19803.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 29801561 is about 5459.0806002476. The cubic root of 29801561 is about 310.0366276527.

The spelling of 29801561 in words is "twenty-nine million, eight hundred one thousand, five hundred sixty-one".