51520234 has 16 divisors (see below), whose sum is σ = 83171016. Its totient is φ = 23846400.

The previous prime is 51520219. The next prime is 51520247. The reversal of 51520234 is 43202515.

It can be written as a sum of positive squares in 4 ways, for example, as 24532209 + 26988025 = 4953^2 + 5195^2 .

It is a super-2 number, since 2×51520234² = 5308669022829512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10347 + ... + 14494.

Almost surely, 2^51520234 is an apocalyptic number.

51520234 is a deficient number, since it is larger than the sum of its proper divisors (31650782).

51520234 is a wasteful number, since it uses less digits than its factorization.

51520234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24921.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51520234 is about 7177.7596783398. The cubic root of 51520234 is about 372.0996620859.

Adding to 51520234 its reverse (43202515), we get a palindrome (94722749).

The spelling of 51520234 in words is "fifty-one million, five hundred twenty thousand, two hundred thirty-four".