1047732221 has 4 divisors (see below), whose sum is σ = 1047867744. Its totient is φ = 1047596700.

The previous prime is 1047732199. The next prime is 1047732229. The reversal of 1047732221 is 1222377401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1047732221 - 2¹⁸ = 1047470077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047732229) 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, 55415 + ... + 71876.

It is an arithmetic number, because the mean of its divisors is an integer number (261966936).

Almost surely, 2^1047732221 is an apocalyptic number.

It is an amenable number.

1047732221 is a deficient number, since it is larger than the sum of its proper divisors (135523).

1047732221 is an equidigital number, since it uses as much as digits as its factorization.

1047732221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135522.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 1047732221 is about 32368.6919877835. The cubic root of 1047732221 is about 1015.6640953168.

The spelling of 1047732221 in words is "one billion, forty-seven million, seven hundred thirty-two thousand, two hundred twenty-one".