51542232 has 64 divisors (see below), whose sum is σ = 155934720. Its totient is φ = 13859328.

The previous prime is 51542203. The next prime is 51542261. The reversal of 51542232 is 23224515.

It is an interprime number because it is at equal distance from previous prime (51542203) and next prime (51542261).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6168 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (2436480).

Almost surely, 2^51542232 is an apocalyptic number.

It is an amenable number.

51542232 is an abundant number, since it is smaller than the sum of its proper divisors (104392488).

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

51542232 is a wasteful number, since it uses less digits than its factorization.

51542232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18080 (or 18076 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 51542232 is about 7179.2918870875. The cubic root of 51542232 is about 372.1526139912.

Adding to 51542232 its reverse (23224515), we get a palindrome (74766747).

The spelling of 51542232 in words is "fifty-one million, five hundred forty-two thousand, two hundred thirty-two".