2021503401 has 24 divisors (see below), whose sum is σ = 3060753696. Its totient is φ = 1284212160.

The previous prime is 2021503349. The next prime is 2021503411. The reversal of 2021503401 is 1043051202.

It is not a de Polignac number, because 2021503401 - 2¹⁰ = 2021502377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021503411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47835 + ... + 79568.

It is an arithmetic number, because the mean of its divisors is an integer number (127531404).

Almost surely, 2^2021503401 is an apocalyptic number.

It is an amenable number.

2021503401 is a deficient number, since it is larger than the sum of its proper divisors (1039250295).

2021503401 is a wasteful number, since it uses less digits than its factorization.

2021503401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127493 (or 127490 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2021503401 is about 44961.1321143051. The cubic root of 2021503401 is about 1264.4203942762.

Adding to 2021503401 its reverse (1043051202), we get a palindrome (3064554603).

The spelling of 2021503401 in words is "two billion, twenty-one million, five hundred three thousand, four hundred one".