1256516222 has 16 divisors (see below), whose sum is σ = 2030742672. Its totient is φ = 579648960.

The previous prime is 1256516221. The next prime is 1256516231. The reversal of 1256516222 is 2226156521.

It is a super-2 number, since 2×1256516222² = 3157666032298306568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256516221) 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, 48713 + ... + 69899.

It is an arithmetic number, because the mean of its divisors is an integer number (126921417).

Almost surely, 2^1256516222 is an apocalyptic number.

1256516222 is a deficient number, since it is larger than the sum of its proper divisors (774226450).

1256516222 is a wasteful number, since it uses less digits than its factorization.

1256516222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23483.

The product of its digits is 14400, while the sum is 32.

The square root of 1256516222 is about 35447.3725683583. The cubic root of 1256516222 is about 1079.0859384190.

The spelling of 1256516222 in words is "one billion, two hundred fifty-six million, five hundred sixteen thousand, two hundred twenty-two".