51616230154 has 4 divisors (see below), whose sum is σ = 77424345234. Its totient is φ = 25808115076.

The previous prime is 51616230119. The next prime is 51616230179. The reversal of 51616230154 is 45103261615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45103261615 = 5 ⋅9020652323.

It can be written as a sum of positive squares in only one way, i.e., 28165901929 + 23450328225 = 167827^2 + 153135^2 .

It is a super-3 number, since 3×51616230154³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12904057537 + ... + 12904057540.

Almost surely, 2^51616230154 is an apocalyptic number.

51616230154 is a deficient number, since it is larger than the sum of its proper divisors (25808115080).

51616230154 is a wasteful number, since it uses less digits than its factorization.

51616230154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25808115079.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 51616230154 its reverse (45103261615), we get a palindrome (96719491769).

The spelling of 51616230154 in words is "fifty-one billion, six hundred sixteen million, two hundred thirty thousand, one hundred fifty-four".