1521303220373 has 8 divisors (see below), whose sum is σ = 1573985740800. Its totient is φ = 1468635619248.

The previous prime is 1521303220363. The next prime is 1521303220387. The reversal of 1521303220373 is 3730223031251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1521303220373 - 2¹⁴ = 1521303203989 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 (1521303220303) 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, 3522161 + ... + 3930422.

It is an arithmetic number, because the mean of its divisors is an integer number (196748217600).

Almost surely, 2^{1521303220373} is an apocalyptic number.

It is an amenable number.

1521303220373 is a deficient number, since it is larger than the sum of its proper divisors (52682520427).

1521303220373 is an equidigital number, since it uses as much as digits as its factorization.

1521303220373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7459651.

The product of its (nonzero) digits is 22680, while the sum is 32.

The spelling of 1521303220373 in words is "one trillion, five hundred twenty-one billion, three hundred three million, two hundred twenty thousand, three hundred seventy-three".