1051491445523 has 4 divisors (see below), whose sum is σ = 1051526266848. Its totient is φ = 1051456624200.

The previous prime is 1051491445517. The next prime is 1051491445531. The reversal of 1051491445523 is 3255441941501.

1051491445523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1051491445523 - 2⁸ = 1051491445267 is a prime.

It is a super-2 number, since 2×1051491445523² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051491445553) 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, 17365328 + ... + 17425773.

It is an arithmetic number, because the mean of its divisors is an integer number (262881566712).

Almost surely, 2^{1051491445523} is an apocalyptic number.

1051491445523 is a deficient number, since it is larger than the sum of its proper divisors (34821325).

1051491445523 is an equidigital number, since it uses as much as digits as its factorization.

1051491445523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34821324.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 1051491445523 in words is "one trillion, fifty-one billion, four hundred ninety-one million, four hundred forty-five thousand, five hundred twenty-three".