51099982 has 4 divisors (see below), whose sum is σ = 76649976. Its totient is φ = 25549990.

The previous prime is 51099967. The next prime is 51099989. The reversal of 51099982 is 28999015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28999015 = 5 ⋅5799803.

It is a super-2 number, since 2×51099982² = 5222416320800648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51099989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12774994 + ... + 12774997.

It is an arithmetic number, because the mean of its divisors is an integer number (19162494).

Almost surely, 2^51099982 is an apocalyptic number.

51099982 is a deficient number, since it is larger than the sum of its proper divisors (25549994).

51099982 is a wasteful number, since it uses less digits than its factorization.

51099982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25549993.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 51099982 is about 7148.4251412461. The cubic root of 51099982 is about 371.0851561390.

The spelling of 51099982 in words is "fifty-one million, ninety-nine thousand, nine hundred eighty-two".