51920002 has 8 divisors (see below), whose sum is σ = 77978700. Its totient is φ = 25927104.

The previous prime is 51919999. The next prime is 51920017. The reversal of 51920002 is 20002915.

It can be written as a sum of positive squares in 2 ways, for example, as 51108201 + 811801 = 7149^2 + 901^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14427 + ... + 17662.

Almost surely, 2^51920002 is an apocalyptic number.

51920002 is a deficient number, since it is larger than the sum of its proper divisors (26058698).

51920002 is a wasteful number, since it uses less digits than its factorization.

51920002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32900.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 51920002 is about 7205.5535526426. The cubic root of 51920002 is about 373.0596114000.

Adding to 51920002 its reverse (20002915), we get a palindrome (71922917).

The spelling of 51920002 in words is "fifty-one million, nine hundred twenty thousand, two".