61156212 has 96 divisors (see below), whose sum is σ = 165580800. Its totient is φ = 17407872.

The previous prime is 61156187. The next prime is 61156217. The reversal of 61156212 is 21265116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61156217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139089 + ... + 139527.

It is an arithmetic number, because the mean of its divisors is an integer number (1724800).

Almost surely, 2^61156212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61156212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82790400).

61156212 is an abundant number, since it is smaller than the sum of its proper divisors (104424588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61156212 is a wasteful number, since it uses less digits than its factorization.

61156212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 523 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 61156212 is about 7820.2437302171. The cubic root of 61156212 is about 393.9854581627.

The spelling of 61156212 in words is "sixty-one million, one hundred fifty-six thousand, two hundred twelve".