51124774 has 4 divisors (see below), whose sum is σ = 76687164. Its totient is φ = 25562386.

The previous prime is 51124769. The next prime is 51124781. The reversal of 51124774 is 47742115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47742115 = 5 ⋅9548423.

It is a super-2 number, since 2×51124774² = 5227485033102152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12781192 + ... + 12781195.

It is an arithmetic number, because the mean of its divisors is an integer number (19171791).

Almost surely, 2^51124774 is an apocalyptic number.

51124774 is a deficient number, since it is larger than the sum of its proper divisors (25562390).

51124774 is a wasteful number, since it uses less digits than its factorization.

51124774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25562389.

The product of its digits is 7840, while the sum is 31.

The square root of 51124774 is about 7150.1590192107. The cubic root of 51124774 is about 371.1451591331.

Adding to 51124774 its reverse (47742115), we get a palindrome (98866889).

The spelling of 51124774 in words is "fifty-one million, one hundred twenty-four thousand, seven hundred seventy-four".