6211425281 has 4 divisors (see below), whose sum is σ = 6211938564. Its totient is φ = 6210912000.

The previous prime is 6211425247. The next prime is 6211425313. The reversal of 6211425281 is 1825241126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2440360000 + 3771065281 = 49400^2 + 61409^2 .

It is a cyclic number.

It is not a de Polignac number, because 6211425281 - 2¹⁰ = 6211424257 is a prime.

It is a super-2 number, since 2×6211425281² = 77163608042891857922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6211425211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238040 + ... + 262841.

It is an arithmetic number, because the mean of its divisors is an integer number (1552984641).

Almost surely, 2^6211425281 is an apocalyptic number.

It is an amenable number.

6211425281 is a deficient number, since it is larger than the sum of its proper divisors (513283).

6211425281 is a wasteful number, since it uses less digits than its factorization.

6211425281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513282.

The product of its digits is 7680, while the sum is 32.

The square root of 6211425281 is about 78812.5959539463. The cubic root of 6211425281 is about 1838.2183132409.

The spelling of 6211425281 in words is "six billion, two hundred eleven million, four hundred twenty-five thousand, two hundred eighty-one".