61212522 has 32 divisors (see below), whose sum is σ = 145999872. Its totient is φ = 16728624.

The previous prime is 61212511. The next prime is 61212539. The reversal of 61212522 is 22521216.

It is a happy number.

61212522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30718 + ... + 32649.

It is an arithmetic number, because the mean of its divisors is an integer number (4562496).

Almost surely, 2^61212522 is an apocalyptic number.

61212522 is an abundant number, since it is smaller than the sum of its proper divisors (84787350).

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

61212522 is a wasteful number, since it uses less digits than its factorization.

61212522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63402.

The product of its digits is 480, while the sum is 21.

The square root of 61212522 is about 7823.8431732749. The cubic root of 61212522 is about 394.1063426693.

Adding to 61212522 its reverse (22521216), we get a palindrome (83733738).

The spelling of 61212522 in words is "sixty-one million, two hundred twelve thousand, five hundred twenty-two".