61145211 has 16 divisors (see below), whose sum is σ = 86710400. Its totient is φ = 38216448.

The previous prime is 61145197. The next prime is 61145221. The reversal of 61145211 is 11254116.

61145211 is a nontrivial binomial coefficient, being equal to C(11059, 2).

It is not a de Polignac number, because 61145211 - 2⁷ = 61145083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61145221) 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, 1 + ... + 11058.

It is an arithmetic number, because the mean of its divisors is an integer number (5419400).

Almost surely, 2^61145211 is an apocalyptic number.

61145211 is the 11058-th triangular number.

61145211 is a deficient number, since it is larger than the sum of its proper divisors (25565189).

61145211 is a wasteful number, since it uses less digits than its factorization.

61145211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11178.

The product of its digits is 240, while the sum is 21.

The square root of 61145211 is about 7819.5403317586. The cubic root of 61145211 is about 393.9618329043.

Adding to 61145211 its reverse (11254116), we get a palindrome (72399327).

It can be divided in two parts, 6114 and 5211, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 61145211 in words is "sixty-one million, one hundred forty-five thousand, two hundred eleven".