61813422 has 64 divisors (see below), whose sum is σ = 157766400. Its totient is φ = 17742240.

The previous prime is 61813417. The next prime is 61813429. The reversal of 61813422 is 22431816.

61813422 is a `hidden beast` number, since 618 + 1 + 3 + 42 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61813429) 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, 8548 + ... + 14024.

It is an arithmetic number, because the mean of its divisors is an integer number (2465100).

Almost surely, 2^61813422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61813422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78883200).

61813422 is an abundant number, since it is smaller than the sum of its proper divisors (95952978).

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

61813422 is a wasteful number, since it uses less digits than its factorization.

61813422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5518 (or 5512 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 61813422 is about 7862.1512323282. The cubic root of 61813422 is about 395.3917429616.

The spelling of 61813422 in words is "sixty-one million, eight hundred thirteen thousand, four hundred twenty-two".