51902030 has 32 divisors (see below), whose sum is σ = 98397504. Its totient is φ = 19672576.

The previous prime is 51902027. The next prime is 51902047. The reversal of 51902030 is 3020915.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51901993 and 51902011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24992 + ... + 26988.

It is an arithmetic number, because the mean of its divisors is an integer number (3074922).

Almost surely, 2^51902030 is an apocalyptic number.

51902030 is a deficient number, since it is larger than the sum of its proper divisors (46495474).

51902030 is a wasteful number, since it uses less digits than its factorization.

51902030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 51902030 is about 7204.3063510653. The cubic root of 51902030 is about 373.0165618313.

Adding to 51902030 its reverse (3020915), we get a palindrome (54922945).

The spelling of 51902030 in words is "fifty-one million, nine hundred two thousand, thirty".