5151321 has 18 divisors (see below), whose sum is σ = 8656362. Its totient is φ = 2943360.

The previous prime is 5151319. The next prime is 5151343. The reversal of 5151321 is 1231515.

5151321 = T₂₇₄ + T₂₇₅ + ... + T₃₇₁.

It can be written as a sum of positive squares in only one way, i.e., 4410000 + 741321 = 2100^2 + 861^2 .

It is not a de Polignac number, because 5151321 - 2¹ = 5151319 is a prime.

It is a super-2 number, since 2×5151321² = 53072216090082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5151294 and 5151303.

It is not an unprimeable number, because it can be changed into a prime (5151361) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5400 + ... + 6281.

It is an arithmetic number, because the mean of its divisors is an integer number (480909).

Almost surely, 2^5151321 is an apocalyptic number.

It is an amenable number.

5151321 is a deficient number, since it is larger than the sum of its proper divisors (3505041).

5151321 is a wasteful number, since it uses less digits than its factorization.

5151321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11701 (or 11691 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 5151321 is about 2269.6521759953. The cubic root of 5151321 is about 172.7055143498.

Adding to 5151321 its reverse (1231515), we get a palindrome (6382836).

It can be divided in two parts, 5151 and 321, that multiplied together give a triangular number (1653471 = T₁₈₁₈).

The spelling of 5151321 in words is "five million, one hundred fifty-one thousand, three hundred twenty-one".