51122394 has 32 divisors (see below), whose sum is σ = 113840640. Its totient is φ = 17005536.

The previous prime is 51122387. The next prime is 51122413. The reversal of 51122394 is 49322115.

It is a super-2 number, since 2×51122394² = 5226998336582472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 46054 + ... + 47150.

It is an arithmetic number, because the mean of its divisors is an integer number (3557520).

Almost surely, 2^51122394 is an apocalyptic number.

51122394 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51122394 is an abundant number, since it is smaller than the sum of its proper divisors (62718246).

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

51122394 is a wasteful number, since it uses less digits than its factorization.

51122394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971 (or 1965 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 51122394 is about 7149.9925874087. The cubic root of 51122394 is about 371.1393997650.

The spelling of 51122394 in words is "fifty-one million, one hundred twenty-two thousand, three hundred ninety-four".