2051501500100 has 36 divisors (see below), whose sum is σ = 4794201200964. Its totient is φ = 757477476480.

The previous prime is 2051501500063. The next prime is 2051501500109. The reversal of 2051501500100 is 10051051502.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 351940816516 + 1699560683584 = 593246^2 + 1303672^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2051501500109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 789037739 + ... + 789040338.

Almost surely, 2^{2051501500100} is an apocalyptic number.

2051501500100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051501500100 is an abundant number, since it is smaller than the sum of its proper divisors (2742699700864).

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

2051501500100 is a wasteful number, since it uses less digits than its factorization.

2051501500100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578078104 (or 1578078097 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

Adding to 2051501500100 its reverse (10051051502), we get a palindrome (2061552551602).

The spelling of 2051501500100 in words is "two trillion, fifty-one billion, five hundred one million, five hundred thousand, one hundred".