51153620 has 48 divisors (see below), whose sum is σ = 123475968. Its totient is φ = 17437440.

The previous prime is 51153601. The next prime is 51153667. The reversal of 51153620 is 2635115.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 25784 + ... + 27696.

It is an arithmetic number, because the mean of its divisors is an integer number (2572416).

Almost surely, 2^51153620 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 51153620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61737984).

51153620 is an abundant number, since it is smaller than the sum of its proper divisors (72322348).

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

51153620 is a wasteful number, since it uses less digits than its factorization.

51153620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51153620 is about 7152.1758926917. The cubic root of 51153620 is about 371.2149494357.

Adding to 51153620 its reverse (2635115), we get a palindrome (53788735).

The spelling of 51153620 in words is "fifty-one million, one hundred fifty-three thousand, six hundred twenty".