61051111 has 12 divisors (see below), whose sum is σ = 67397400. Its totient is φ = 54842880.

The previous prime is 61051103. The next prime is 61051117. The reversal of 61051111 is 11115016.

It is not a de Polignac number, because 61051111 - 2³ = 61051103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61051117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316231 + ... + 316423.

It is an arithmetic number, because the mean of its divisors is an integer number (5616450).

Almost surely, 2^61051111 is an apocalyptic number.

61051111 is a deficient number, since it is larger than the sum of its proper divisors (6346289).

61051111 is a wasteful number, since it uses less digits than its factorization.

61051111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 16.

The square root of 61051111 is about 7813.5210372789. The cubic root of 61051111 is about 393.7596320479.

Adding to 61051111 its reverse (11115016), we get a palindrome (72166127).

The spelling of 61051111 in words is "sixty-one million, fifty-one thousand, one hundred eleven".