29997928349251 has 2 divisors, whose sum is σ = 29997928349252. Its totient is φ = 29997928349250.

The previous prime is 29997928349243. The next prime is 29997928349269. The reversal of 29997928349251 is 15294382979992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29997928349251 - 2³ = 29997928349243 is a prime.

It is a super-2 number, since 2×29997928349251² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29997928349201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14998964174625 + 14998964174626.

It is an arithmetic number, because the mean of its divisors is an integer number (14998964174626).

Almost surely, 2^{29997928349251} is an apocalyptic number.

29997928349251 is a deficient number, since it is larger than the sum of its proper divisors (1).

29997928349251 is an equidigital number, since it uses as much as digits as its factorization.

29997928349251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587237120, while the sum is 79.

The spelling of 29997928349251 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred twenty-eight million, three hundred forty-nine thousand, two hundred fifty-one".