1040221551 has 16 divisors (see below), whose sum is σ = 1472083200. Its totient is φ = 651116928.

The previous prime is 1040221543. The next prime is 1040221577. The reversal of 1040221551 is 1551220401.

It is not a de Polignac number, because 1040221551 - 2³ = 1040221543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040221541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2971 + ... + 45708.

It is an arithmetic number, because the mean of its divisors is an integer number (92005200).

Almost surely, 2^1040221551 is an apocalyptic number.

1040221551 is a deficient number, since it is larger than the sum of its proper divisors (431861649).

1040221551 is a wasteful number, since it uses less digits than its factorization.

1040221551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49118.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1040221551 is about 32252.4658127096. The cubic root of 1040221551 is about 1013.2313430963.

Adding to 1040221551 its reverse (1551220401), we get a palindrome (2591441952).

The spelling of 1040221551 in words is "one billion, forty million, two hundred twenty-one thousand, five hundred fifty-one".