61552020 has 48 divisors (see below), whose sum is σ = 181419840. Its totient is φ = 15549696.

The previous prime is 61552013. The next prime is 61552021. The reversal of 61552020 is 2025516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61552021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25857 + ... + 28136.

It is an arithmetic number, because the mean of its divisors is an integer number (3779580).

Almost surely, 2^61552020 is an apocalyptic number.

61552020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61552020 is an abundant number, since it is smaller than the sum of its proper divisors (119867820).

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

61552020 is a wasteful number, since it uses less digits than its factorization.

61552020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54024 (or 54022 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 61552020 is about 7845.5095436817. The cubic root of 61552020 is about 394.8335997289.

Adding to 61552020 its reverse (2025516), we get a palindrome (63577536).

The spelling of 61552020 in words is "sixty-one million, five hundred fifty-two thousand, twenty".