1521055650 has 24 divisors (see below), whose sum is σ = 3772218384. Its totient is φ = 405614800.

The previous prime is 1521055633. The next prime is 1521055661. The reversal of 1521055650 is 565501251.

It is a super-2 number, since 2×1521055650² = 4627220580793845000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5070036 + ... + 5070335.

It is an arithmetic number, because the mean of its divisors is an integer number (157175766).

Almost surely, 2^1521055650 is an apocalyptic number.

1521055650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1521055650 is an abundant number, since it is smaller than the sum of its proper divisors (2251162734).

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

1521055650 is a wasteful number, since it uses less digits than its factorization.

1521055650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10140386 (or 10140381 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 1521055650 is about 39000.7134550126. The cubic root of 1521055650 is about 1150.0455306485.

The spelling of 1521055650 in words is "one billion, five hundred twenty-one million, fifty-five thousand, six hundred fifty".