51152823 has 32 divisors (see below), whose sum is σ = 77932800. Its totient is φ = 33149088.

The previous prime is 51152809. The next prime is 51152837. The reversal of 51152823 is 32825115.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51152809) and next prime (51152837).

It is not a de Polignac number, because 51152823 - 2⁸ = 51152567 is a prime.

It is a super-2 number, since 2×51152823² = 5233222601738658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51152323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259561 + ... + 259757.

It is an arithmetic number, because the mean of its divisors is an integer number (2435400).

Almost surely, 2^51152823 is an apocalyptic number.

51152823 is a deficient number, since it is larger than the sum of its proper divisors (26779977).

51152823 is a wasteful number, since it uses less digits than its factorization.

51152823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 422 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 51152823 is about 7152.1201751648. The cubic root of 51152823 is about 371.2130215184.

Adding to 51152823 its reverse (32825115), we get a palindrome (83977938).

The spelling of 51152823 in words is "fifty-one million, one hundred fifty-two thousand, eight hundred twenty-three".