29972281 has 2 divisors, whose sum is σ = 29972282. Its totient is φ = 29972280.

The previous prime is 29972251. The next prime is 29972311. The reversal of 29972281 is 18227992.

It is a balanced prime because it is at equal distance from previous prime (29972251) and next prime (29972311).

It can be written as a sum of positive squares in only one way, i.e., 15872256 + 14100025 = 3984^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 29972281 - 2¹⁷ = 29841209 is a prime.

It is a super-2 number, since 2×29972281² = 1796675256685922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29972221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14986140 + 14986141.

It is an arithmetic number, because the mean of its divisors is an integer number (14986141).

Almost surely, 2^29972281 is an apocalyptic number.

It is an amenable number.

29972281 is a deficient number, since it is larger than the sum of its proper divisors (1).

29972281 is an equidigital number, since it uses as much as digits as its factorization.

29972281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 29972281 is about 5474.6946033546. The cubic root of 29972281 is about 310.6275217972.

The spelling of 29972281 in words is "twenty-nine million, nine hundred seventy-two thousand, two hundred eighty-one".