1225552011 has 4 divisors (see below), whose sum is σ = 1634069352. Its totient is φ = 817034672.

The previous prime is 1225551979. The next prime is 1225552057. The reversal of 1225552011 is 1102555221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225552011 - 2⁵ = 1225551979 is a prime.

It is a super-2 number, since 2×1225552011² = 3003955463332288242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225552091) 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, 204258666 + ... + 204258671.

It is an arithmetic number, because the mean of its divisors is an integer number (408517338).

Almost surely, 2^1225552011 is an apocalyptic number.

1225552011 is a deficient number, since it is larger than the sum of its proper divisors (408517341).

1225552011 is an equidigital number, since it uses as much as digits as its factorization.

1225552011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408517340.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 1225552011 is about 35007.8849832434. The cubic root of 1225552011 is about 1070.1481761194.

The spelling of 1225552011 in words is "one billion, two hundred twenty-five million, five hundred fifty-two thousand, eleven".