2081507501 has 4 divisors (see below), whose sum is σ = 2095477500. Its totient is φ = 2067537504.

The previous prime is 2081507479. The next prime is 2081507503. The reversal of 2081507501 is 1057051802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1287733225 + 793774276 = 35885^2 + 28174^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081507501 - 2²⁶ = 2014398637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081507503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6984776 + ... + 6985073.

It is an arithmetic number, because the mean of its divisors is an integer number (523869375).

Almost surely, 2^2081507501 is an apocalyptic number.

It is an amenable number.

2081507501 is a deficient number, since it is larger than the sum of its proper divisors (13969999).

2081507501 is a wasteful number, since it uses less digits than its factorization.

2081507501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13969998.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 2081507501 is about 45623.5410835240. The cubic root of 2081507501 is about 1276.8091709287.

The spelling of 2081507501 in words is "two billion, eighty-one million, five hundred seven thousand, five hundred one".