102472220 has 24 divisors (see below), whose sum is σ = 219772224. Its totient is φ = 40116416.

The previous prime is 102472207. The next prime is 102472229. The reversal of 102472220 is 22274201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 102472192 and 102472201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102472229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53567 + ... + 55446.

It is an arithmetic number, because the mean of its divisors is an integer number (9157176).

Almost surely, 2^102472220 is an apocalyptic number.

102472220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102472220 is an abundant number, since it is smaller than the sum of its proper divisors (117300004).

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

102472220 is a wasteful number, since it uses less digits than its factorization.

102472220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109069 (or 109067 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 102472220 is about 10122.8563162775. The cubic root of 102472220 is about 467.9527979764.

The spelling of 102472220 in words is "one hundred two million, four hundred seventy-two thousand, two hundred twenty".