29997465390521 has 4 divisors (see below), whose sum is σ = 30043829325312. Its totient is φ = 29951101455732.

The previous prime is 29997465390517. The next prime is 29997465390533. The reversal of 29997465390521 is 12509356479992.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29997465390521 - 2² = 29997465390517 is a prime.

It is a super-2 number, since 2×29997465390521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29997465390121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23181966425 + ... + 23181967718.

It is an arithmetic number, because the mean of its divisors is an integer number (7510957331328).

Almost surely, 2^{29997465390521} is an apocalyptic number.

It is an amenable number.

29997465390521 is a deficient number, since it is larger than the sum of its proper divisors (46363934791).

29997465390521 is an equidigital number, since it uses as much as digits as its factorization.

29997465390521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46363934790.

The product of its (nonzero) digits is 330674400, while the sum is 71.

The spelling of 29997465390521 in words is "twenty-nine trillion, nine hundred ninety-seven billion, four hundred sixty-five million, three hundred ninety thousand, five hundred twenty-one".