1264222551 has 32 divisors (see below), whose sum is σ = 1803191040. Its totient is φ = 785562624.

The previous prime is 1264222537. The next prime is 1264222601. The reversal of 1264222551 is 1552224621.

It is not a de Polignac number, because 1264222551 - 2⁹ = 1264222039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264222951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1669665 + ... + 1670421.

It is an arithmetic number, because the mean of its divisors is an integer number (56349720).

Almost surely, 2^1264222551 is an apocalyptic number.

1264222551 is a deficient number, since it is larger than the sum of its proper divisors (538968489).

1264222551 is a wasteful number, since it uses less digits than its factorization.

1264222551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215.

The product of its digits is 9600, while the sum is 30.

The square root of 1264222551 is about 35555.9073994744. The cubic root of 1264222551 is about 1081.2874880428.

The spelling of 1264222551 in words is "one billion, two hundred sixty-four million, two hundred twenty-two thousand, five hundred fifty-one".