29701420281 has 63 divisors (see below), whose sum is σ = 48319189887. Its totient is φ = 18240571440.

The previous prime is 29701420279. The next prime is 29701420313. The reversal of 29701420281 is 18202410792.

The square root of 29701420281 is 172341.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4393701225 + 25307719056 = 66285^2 + 159084^2 .

It is not a de Polignac number, because 29701420281 - 2¹ = 29701420279 is a prime.

It is a super-2 number, since 2×29701420281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29701420211) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 60491446 + ... + 60491936.

Almost surely, 2^29701420281 is an apocalyptic number.

29701420281 is the 172341-st square number.

29701420281 is the 86171-st centered octagonal number.

It is an amenable number.

29701420281 is a deficient number, since it is larger than the sum of its proper divisors (18617769606).

29701420281 is an frugal number, since it uses more digits than its factorization.

29701420281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

Multiplying 29701420281 by its sum of digits (36), we get a square (1069251130116 = 1034046²).

The spelling of 29701420281 in words is "twenty-nine billion, seven hundred one million, four hundred twenty thousand, two hundred eighty-one".