51233436 has 72 divisors (see below), whose sum is σ = 134350944. Its totient is φ = 16450560.

The previous prime is 51233423. The next prime is 51233437. The reversal of 51233436 is 63433215.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51233437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151860 + ... + 152196.

Almost surely, 2^51233436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51233436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67175472).

51233436 is an abundant number, since it is smaller than the sum of its proper divisors (83117508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51233436 is a wasteful number, since it uses less digits than its factorization.

51233436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 486 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 51233436 is about 7157.7535582053. The cubic root of 51233436 is about 371.4079204354.

The spelling of 51233436 in words is "fifty-one million, two hundred thirty-three thousand, four hundred thirty-six".