61552220 has 12 divisors (see below), whose sum is σ = 129259704. Its totient is φ = 24620880.

The previous prime is 61552199. The next prime is 61552241. The reversal of 61552220 is 2225516.

It is an interprime number because it is at equal distance from previous prime (61552199) and next prime (61552241).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538786 + ... + 1538825.

It is an arithmetic number, because the mean of its divisors is an integer number (10771642).

Almost surely, 2^61552220 is an apocalyptic number.

It is an amenable number.

61552220 is an abundant number, since it is smaller than the sum of its proper divisors (67707484).

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

61552220 is a wasteful number, since it uses less digits than its factorization.

61552220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077620 (or 3077618 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 61552220 is about 7845.5222898160. The cubic root of 61552220 is about 394.8340273706.

Adding to 61552220 its reverse (2225516), we get a palindrome (63777736).

The spelling of 61552220 in words is "sixty-one million, five hundred fifty-two thousand, two hundred twenty".