61102320 has 40 divisors (see below), whose sum is σ = 189417936. Its totient is φ = 16293888.

The previous prime is 61102319. The next prime is 61102339. The reversal of 61102320 is 2320116.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 61102320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127057 + ... + 127536.

Almost surely, 2^61102320 is an apocalyptic number.

61102320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61102320 is an abundant number, since it is smaller than the sum of its proper divisors (128315616).

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

61102320 is a wasteful number, since it uses less digits than its factorization.

61102320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254609 (or 254603 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 61102320 is about 7816.7972981266. The cubic root of 61102320 is about 393.8696950290.

Adding to 61102320 its reverse (2320116), we get a palindrome (63422436).

The spelling of 61102320 in words is "sixty-one million, one hundred two thousand, three hundred twenty".