51523011 has 12 divisors (see below), whose sum is σ = 75009792. Its totient is φ = 34077456.

The previous prime is 51523009. The next prime is 51523027. The reversal of 51523011 is 11032515.

It is not a de Polignac number, because 51523011 - 2¹ = 51523009 is a prime.

It is a super-2 number, since 2×51523011² = 5309241325012242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51523001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21396 + ... + 23681.

It is an arithmetic number, because the mean of its divisors is an integer number (6250816).

Almost surely, 2^51523011 is an apocalyptic number.

51523011 is a deficient number, since it is larger than the sum of its proper divisors (23486781).

51523011 is a wasteful number, since it uses less digits than its factorization.

51523011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45210 (or 45207 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51523011 is about 7177.9531204933. The cubic root of 51523011 is about 372.1063474994.

Adding to 51523011 its reverse (11032515), we get a palindrome (62555526).

The spelling of 51523011 in words is "fifty-one million, five hundred twenty-three thousand, eleven".