1220151500 has 48 divisors (see below), whose sum is σ = 2805085920. Its totient is φ = 462369600.

The previous prime is 1220151473. The next prime is 1220151511. The reversal of 1220151500 is 51510221.

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, 54719 + ... + 73718.

It is an arithmetic number, because the mean of its divisors is an integer number (58439290).

Almost surely, 2^1220151500 is an apocalyptic number.

1220151500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220151500 is an abundant number, since it is smaller than the sum of its proper divisors (1584934420).

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

1220151500 is a wasteful number, since it uses less digits than its factorization.

1220151500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128475 (or 128463 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1220151500 is about 34930.6670420134. The cubic root of 1220151500 is about 1068.5739584422.

Adding to 1220151500 its reverse (51510221), we get a palindrome (1271661721).

The spelling of 1220151500 in words is "one billion, two hundred twenty million, one hundred fifty-one thousand, five hundred".