51153621 has 8 divisors (see below), whose sum is σ = 68259744. Its totient is φ = 34074960.

The previous prime is 51153601. The next prime is 51153667. The reversal of 51153621 is 12635115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51153621 - 2⁵ = 51153589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51153591 and 51153600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51153601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2031 + ... + 10316.

It is an arithmetic number, because the mean of its divisors is an integer number (8532468).

Almost surely, 2^51153621 is an apocalyptic number.

It is an amenable number.

51153621 is a deficient number, since it is larger than the sum of its proper divisors (17106123).

51153621 is a wasteful number, since it uses less digits than its factorization.

51153621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13731.

The product of its digits is 900, while the sum is 24.

The square root of 51153621 is about 7152.1759626005. The cubic root of 51153621 is about 371.2149518547.

Adding to 51153621 its reverse (12635115), we get a palindrome (63788736).

The spelling of 51153621 in words is "fifty-one million, one hundred fifty-three thousand, six hundred twenty-one".