3135521820 has 48 divisors (see below), whose sum is σ = 9295903008. Its totient is φ = 786954240.

The previous prime is 3135521813. The next prime is 3135521833. The reversal of 3135521820 is 281255313.

It is a super-2 number, since 2×3135521820² = 19662994167392224800, which contains 22 as substring.

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

It is a congruent number.

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, 1536001 + ... + 1538040.

It is an arithmetic number, because the mean of its divisors is an integer number (193664646).

Almost surely, 2^3135521820 is an apocalyptic number.

3135521820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3135521820 is an abundant number, since it is smaller than the sum of its proper divisors (6160381188).

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

3135521820 is a wasteful number, since it uses less digits than its factorization.

3135521820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074070 (or 3074068 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 3135521820 is about 55995.7303729490. The cubic root of 3135521820 is about 1463.6478836797.

The spelling of 3135521820 in words is "three billion, one hundred thirty-five million, five hundred twenty-one thousand, eight hundred twenty".