51390130 has 16 divisors (see below), whose sum is σ = 100911744. Its totient is φ = 18687280.

The previous prime is 51390109. The next prime is 51390137. The reversal of 51390130 is 3109315.

It is a super-2 number, since 2×51390130² = 5281890922833800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (51390137) 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, 233482 + ... + 233701.

It is an arithmetic number, because the mean of its divisors is an integer number (6306984).

Almost surely, 2^51390130 is an apocalyptic number.

51390130 is a deficient number, since it is larger than the sum of its proper divisors (49521614).

51390130 is a wasteful number, since it uses less digits than its factorization.

51390130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467201.

The product of its (nonzero) digits is 405, while the sum is 22.

The square root of 51390130 is about 7168.6909544212. The cubic root of 51390130 is about 371.7861770773.

Adding to 51390130 its reverse (3109315), we get a palindrome (54499445).

The spelling of 51390130 in words is "fifty-one million, three hundred ninety thousand, one hundred thirty".