29980251 has 12 divisors (see below), whose sum is σ = 49491312. Its totient is φ = 17131536.

The previous prime is 29980243. The next prime is 29980253. The reversal of 29980251 is 15208992.

It is not a de Polignac number, because 29980251 - 2³ = 29980243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29980253) 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, 237876 + ... + 238001.

It is an arithmetic number, because the mean of its divisors is an integer number (4124276).

Almost surely, 2^29980251 is an apocalyptic number.

29980251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

29980251 is a deficient number, since it is larger than the sum of its proper divisors (19511061).

29980251 is a wasteful number, since it uses less digits than its factorization.

29980251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475890 (or 475887 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 29980251 is about 5475.4224494554. The cubic root of 29980251 is about 310.6550525897.

The spelling of 29980251 in words is "twenty-nine million, nine hundred eighty thousand, two hundred fifty-one".