61226181 has 6 divisors (see below), whose sum is σ = 88437830. Its totient is φ = 40817448.

The previous prime is 61226171. The next prime is 61226219. The reversal of 61226181 is 18162216.

It can be written as a sum of positive squares in only one way, i.e., 42693156 + 18533025 = 6534^2 + 4305^2 .

It is not a de Polignac number, because 61226181 - 2¹⁵ = 61193413 is a prime.

It is a super-2 number, since 2×61226181² = 7497290479689522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61226171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3401446 + ... + 3401463.

Almost surely, 2^61226181 is an apocalyptic number.

It is an amenable number.

61226181 is a deficient number, since it is larger than the sum of its proper divisors (27211649).

61226181 is a wasteful number, since it uses less digits than its factorization.

61226181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6802915 (or 6802912 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 61226181 is about 7824.7160331861. The cubic root of 61226181 is about 394.1356542002.

Adding to 61226181 its reverse (18162216), we get a palindrome (79388397).

The spelling of 61226181 in words is "sixty-one million, two hundred twenty-six thousand, one hundred eighty-one".