51400370 has 16 divisors (see below), whose sum is σ = 105738048. Its totient is φ = 17622960.

The previous prime is 51400361. The next prime is 51400411. The reversal of 51400370 is 7300415.

It is a happy number.

It is a super-2 number, since 2×51400370² = 5283996072273800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367076 + ... + 367215.

It is an arithmetic number, because the mean of its divisors is an integer number (6608628).

Almost surely, 2^51400370 is an apocalyptic number.

51400370 is an abundant number, since it is smaller than the sum of its proper divisors (54337678).

51400370 is a wasteful number, since it uses less digits than its factorization.

51400370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734305.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 51400370 is about 7169.4051357138. The cubic root of 51400370 is about 371.8108694817.

Adding to 51400370 its reverse (7300415), we get a palindrome (58700785).

The spelling of 51400370 in words is "fifty-one million, four hundred thousand, three hundred seventy".