2051001523 has 4 divisors (see below), whose sum is σ = 2060037000. Its totient is φ = 2041966048.

The previous prime is 2051001497. The next prime is 2051001551. The reversal of 2051001523 is 3251001502.

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

It is a cyclic number.

It is not a de Polignac number, because 2051001523 - 2²¹ = 2048904371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051001523.

It is not an unprimeable number, because it can be changed into a prime (2051001583) 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, 4517398 + ... + 4517851.

It is an arithmetic number, because the mean of its divisors is an integer number (515009250).

Almost surely, 2^2051001523 is an apocalyptic number.

2051001523 is a deficient number, since it is larger than the sum of its proper divisors (9035477).

2051001523 is an equidigital number, since it uses as much as digits as its factorization.

2051001523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9035476.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2051001523 is about 45287.9843115147. The cubic root of 2051001523 is about 1270.5409320700.

The spelling of 2051001523 in words is "two billion, fifty-one million, one thousand, five hundred twenty-three".