2051554152220 has 24 divisors (see below), whose sum is σ = 4321854470304. Its totient is φ = 818032946496.

The previous prime is 2051554152211. The next prime is 2051554152223. The reversal of 2051554152220 is 222514551502.

It is a super-2 number, since 2×2051554152220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051554152223) 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, 161788152 + ... + 161800831.

It is an arithmetic number, because the mean of its divisors is an integer number (180077269596).

Almost surely, 2^{2051554152220} is an apocalyptic number.

2051554152220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051554152220 is an abundant number, since it is smaller than the sum of its proper divisors (2270300318084).

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

2051554152220 is a wasteful number, since it uses less digits than its factorization.

2051554152220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323589309 (or 323589307 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 2051554152220 in words is "two trillion, fifty-one billion, five hundred fifty-four million, one hundred fifty-two thousand, two hundred twenty".