1305225500 has 24 divisors (see below), whose sum is σ = 2850613584. Its totient is φ = 522090000.

The previous prime is 1305225499. The next prime is 1305225503. The reversal of 1305225500 is 55225031.

It is a super-2 number, since 2×1305225500² = 3407227211700500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305225503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304726 + ... + 1305725.

It is an arithmetic number, because the mean of its divisors is an integer number (118775566).

Almost surely, 2^1305225500 is an apocalyptic number.

1305225500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1305225500 is an abundant number, since it is smaller than the sum of its proper divisors (1545388084).

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

1305225500 is a wasteful number, since it uses less digits than its factorization.

1305225500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610470 (or 2610458 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 1305225500 is about 36127.9047275095. The cubic root of 1305225500 is about 1092.8532546359.

The spelling of 1305225500 in words is "one billion, three hundred five million, two hundred twenty-five thousand, five hundred".