61501212 has 36 divisors (see below), whose sum is σ = 155706096. Its totient is φ = 20468160.

The previous prime is 61501211. The next prime is 61501229. The reversal of 61501212 is 21210516.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61501211) 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, 36288 + ... + 37944.

Almost surely, 2^61501212 is an apocalyptic number.

It is an amenable number.

61501212 is an abundant number, since it is smaller than the sum of its proper divisors (94204884).

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

61501212 is a wasteful number, since it uses less digits than its factorization.

61501212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 61501212 is about 7842.2708445960. The cubic root of 61501212 is about 394.7249316041.

Adding to 61501212 its reverse (21210516), we get a palindrome (82711728).

The spelling of 61501212 in words is "sixty-one million, five hundred one thousand, two hundred twelve".