61625220 has 48 divisors (see below), whose sum is σ = 175815360. Its totient is φ = 16122496.

The previous prime is 61625219. The next prime is 61625281. The reversal of 61625220 is 2252616.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6510 + ... + 12869.

It is an arithmetic number, because the mean of its divisors is an integer number (3662820).

Almost surely, 2^61625220 is an apocalyptic number.

61625220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61625220 is an abundant number, since it is smaller than the sum of its proper divisors (114190140).

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

61625220 is a wasteful number, since it uses less digits than its factorization.

61625220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19444 (or 19442 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61625220 is about 7850.1732464959. The cubic root of 61625220 is about 394.9900547622.

Adding to 61625220 its reverse (2252616), we get a palindrome (63877836).

The spelling of 61625220 in words is "sixty-one million, six hundred twenty-five thousand, two hundred twenty".