29981124251 has 16 divisors (see below), whose sum is σ = 32741604000. Its totient is φ = 27288254208.

The previous prime is 29981124227. The next prime is 29981124263. The reversal of 29981124251 is 15242118992.

It is a cyclic number.

It is not a de Polignac number, because 29981124251 - 2²² = 29976929947 is a prime.

It is a super-2 number, since 2×29981124251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29981124281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208880 + ... + 321858.

It is an arithmetic number, because the mean of its divisors is an integer number (2046350250).

Almost surely, 2^29981124251 is an apocalyptic number.

29981124251 is a deficient number, since it is larger than the sum of its proper divisors (2760479749).

29981124251 is a wasteful number, since it uses less digits than its factorization.

29981124251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113278.

The product of its digits is 103680, while the sum is 44.

The spelling of 29981124251 in words is "twenty-nine billion, nine hundred eighty-one million, one hundred twenty-four thousand, two hundred fifty-one".