51780414 has 32 divisors (see below), whose sum is σ = 120128256. Its totient is φ = 14572800.

The previous prime is 51780409. The next prime is 51780473. The reversal of 51780414 is 41408715.

It is a super-2 number, since 2×51780414² = 5362422548022792, which contains 22 as substring.

It is a Curzon number.

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, 6387 + ... + 12014.

It is an arithmetic number, because the mean of its divisors is an integer number (3754008).

Almost surely, 2^51780414 is an apocalyptic number.

51780414 is an abundant number, since it is smaller than the sum of its proper divisors (68347842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51780414 is a wasteful number, since it uses less digits than its factorization.

51780414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18480.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 51780414 is about 7195.8608935971. The cubic root of 51780414 is about 372.7249851752.

The spelling of 51780414 in words is "fifty-one million, seven hundred eighty thousand, four hundred fourteen".