61213061 has 16 divisors (see below), whose sum is σ = 75688704. Its totient is φ = 48207744.

The previous prime is 61213057. The next prime is 61213063. The reversal of 61213061 is 16031216.

It is not a de Polignac number, because 61213061 - 2² = 61213057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61213063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19760 + ... + 22646.

It is an arithmetic number, because the mean of its divisors is an integer number (4730544).

Almost surely, 2^61213061 is an apocalyptic number.

It is an amenable number.

61213061 is a deficient number, since it is larger than the sum of its proper divisors (14475643).

61213061 is a wasteful number, since it uses less digits than its factorization.

61213061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 61213061 is about 7823.8776191860. The cubic root of 61213061 is about 394.1074994190.

Adding to 61213061 its reverse (16031216), we get a palindrome (77244277).

It can be divided in two parts, 6121 and 3061, that multiplied together give a triangular number (18736381 = T₆₁₂₁).

The spelling of 61213061 in words is "sixty-one million, two hundred thirteen thousand, sixty-one".