249520230 has 64 divisors (see below), whose sum is σ = 683398080. Its totient is φ = 64737792.

The previous prime is 249520223. The next prime is 249520231. The reversal of 249520230 is 32025942.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 249520194 and 249520203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249520231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2499 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (10678095).

Almost surely, 2^249520230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249520230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341699040).

249520230 is an abundant number, since it is smaller than the sum of its proper divisors (433877850).

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

249520230 is a wasteful number, since it uses less digits than its factorization.

249520230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25030 (or 25024 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 249520230 is about 15796.2093554118. The cubic root of 249520230 is about 629.5572853396.

The spelling of 249520230 in words is "two hundred forty-nine million, five hundred twenty thousand, two hundred thirty".