1023540221 has 8 divisors (see below), whose sum is σ = 1116821088. Its totient is φ = 930298000.

The previous prime is 1023540211. The next prime is 1023540229. The reversal of 1023540221 is 1220453201.

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 1023540221 - 2⁶ = 1023540157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023540193 and 1023540202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023540229) 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, 96386 + ... + 106476.

It is an arithmetic number, because the mean of its divisors is an integer number (139602636).

Almost surely, 2^1023540221 is an apocalyptic number.

1023540221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1023540221 is a deficient number, since it is larger than the sum of its proper divisors (93280867).

1023540221 is a wasteful number, since it uses less digits than its factorization.

1023540221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19323.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1023540221 is about 31992.8151465294. The cubic root of 1023540221 is about 1007.7859618007.

Adding to 1023540221 its reverse (1220453201), we get a palindrome (2243993422).

The spelling of 1023540221 in words is "one billion, twenty-three million, five hundred forty thousand, two hundred twenty-one".