51280190 has 32 divisors (see below), whose sum is σ = 99743616. Its totient is φ = 18869760.

The previous prime is 51280181. The next prime is 51280213. The reversal of 51280190 is 9108215.

It is a happy number.

It is a super-2 number, since 2×51280190² = 5259315772872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 55835 + ... + 56745.

It is an arithmetic number, because the mean of its divisors is an integer number (3116988).

Almost surely, 2^51280190 is an apocalyptic number.

51280190 is a deficient number, since it is larger than the sum of its proper divisors (48463426).

51280190 is a wasteful number, since it uses less digits than its factorization.

51280190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 51280190 is about 7161.0187822683. The cubic root of 51280190 is about 371.5208644277.

The spelling of 51280190 in words is "fifty-one million, two hundred eighty thousand, one hundred ninety".