51233331 has 8 divisors (see below), whose sum is σ = 68389120. Its totient is φ = 34116552.

The previous prime is 51233321. The next prime is 51233353. The reversal of 51233331 is 13333215.

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

It is not a de Polignac number, because 51233331 - 2¹¹ = 51231283 is a prime.

It is a super-2 number, since 2×51233331² = 5249708410711122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51233298 and 51233307.

It is not an unprimeable number, because it can be changed into a prime (51233311) 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, 6535 + ... + 12048.

It is an arithmetic number, because the mean of its divisors is an integer number (8548640).

Almost surely, 2^51233331 is an apocalyptic number.

51233331 is a deficient number, since it is larger than the sum of its proper divisors (17155789).

51233331 is a wasteful number, since it uses less digits than its factorization.

51233331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19505.

The product of its digits is 810, while the sum is 21.

The square root of 51233331 is about 7157.7462234980. The cubic root of 51233331 is about 371.4076667088.

Adding to 51233331 its reverse (13333215), we get a palindrome (64566546).

It can be divided in two parts, 51 and 233331, that multiplied together give a triangular number (11899881 = T₄₈₇₈).

The spelling of 51233331 in words is "fifty-one million, two hundred thirty-three thousand, three hundred thirty-one".