51351554 has 4 divisors (see below), whose sum is σ = 77027334. Its totient is φ = 25675776.

The previous prime is 51351551. The next prime is 51351563. The reversal of 51351554 is 45515315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45515315 = 5 ⋅9103063.

It can be written as a sum of positive squares in only one way, i.e., 31753225 + 19598329 = 5635^2 + 4427^2 .

It is not an unprimeable number, because it can be changed into a prime (51351551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12837887 + ... + 12837890.

Almost surely, 2^51351554 is an apocalyptic number.

51351554 is a deficient number, since it is larger than the sum of its proper divisors (25675780).

51351554 is a wasteful number, since it uses less digits than its factorization.

51351554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25675779.

The product of its digits is 7500, while the sum is 29.

The square root of 51351554 is about 7165.9998604521. Note that the first 3 decimals coincide. The cubic root of 51351554 is about 371.6931266953.

Adding to 51351554 its reverse (45515315), we get a palindrome (96866869).

The spelling of 51351554 in words is "fifty-one million, three hundred fifty-one thousand, five hundred fifty-four".