51320402 has 16 divisors (see below), whose sum is σ = 88130112. Its totient is φ = 21956400.

The previous prime is 51320393. The next prime is 51320411. The reversal of 51320402 is 20402315.

It is an interprime number because it is at equal distance from previous prime (51320393) and next prime (51320411).

It is a super-2 number, since 2×51320402² = 5267567322883208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6152 + ... + 11852.

It is an arithmetic number, because the mean of its divisors is an integer number (5508132).

Almost surely, 2^51320402 is an apocalyptic number.

51320402 is a deficient number, since it is larger than the sum of its proper divisors (36809710).

51320402 is a wasteful number, since it uses less digits than its factorization.

51320402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6353.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 51320402 is about 7163.8259331170. The cubic root of 51320402 is about 371.6179499603.

Adding to 51320402 its reverse (20402315), we get a palindrome (71722717).

The spelling of 51320402 in words is "fifty-one million, three hundred twenty thousand, four hundred two".