51151002074 has 4 divisors (see below), whose sum is σ = 76726503114. Its totient is φ = 25575501036.

The previous prime is 51151002073. The next prime is 51151002173. The reversal of 51151002074 is 47020015115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47020015115 = 5 ⋅9404003023.

It can be written as a sum of positive squares in only one way, i.e., 29396817025 + 21754185049 = 171455^2 + 147493^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51151002073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12787750517 + ... + 12787750520.

Almost surely, 2^51151002074 is an apocalyptic number.

51151002074 is a deficient number, since it is larger than the sum of its proper divisors (25575501040).

51151002074 is a wasteful number, since it uses less digits than its factorization.

51151002074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25575501039.

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 51151002074 its reverse (47020015115), we get a palindrome (98171017189).

The spelling of 51151002074 in words is "fifty-one billion, one hundred fifty-one million, two thousand, seventy-four".