51223011 has 16 divisors (see below), whose sum is σ = 78175488. Its totient is φ = 29224800.

The previous prime is 51223009. The next prime is 51223027. The reversal of 51223011 is 11032215.

It is not a de Polignac number, because 51223011 - 2¹ = 51223009 is a prime.

It is a super-2 number, since 2×51223011² = 5247593711812242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51223061) 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, 15756 + ... + 18726.

It is an arithmetic number, because the mean of its divisors is an integer number (4885968).

Almost surely, 2^51223011 is an apocalyptic number.

51223011 is a deficient number, since it is larger than the sum of its proper divisors (26952477).

51223011 is a wasteful number, since it uses less digits than its factorization.

51223011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 51223011 is about 7157.0252898813. The cubic root of 51223011 is about 371.3827273159.

Adding to 51223011 its reverse (11032215), we get a palindrome (62255226).

The spelling of 51223011 in words is "fifty-one million, two hundred twenty-three thousand, eleven".