51115300546 has 4 divisors (see below), whose sum is σ = 76672950822. Its totient is φ = 25557650272.

The previous prime is 51115300541. The next prime is 51115300571. The reversal of 51115300546 is 64500351115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64500351115 = 5 ⋅12900070223.

It can be written as a sum of positive squares in only one way, i.e., 51058373521 + 56927025 = 225961^2 + 7545^2 .

It is a super-2 number, since 2×51115300546² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51115300541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778825135 + ... + 12778825138.

Almost surely, 2^51115300546 is an apocalyptic number.

51115300546 is a deficient number, since it is larger than the sum of its proper divisors (25557650276).

51115300546 is a wasteful number, since it uses less digits than its factorization.

51115300546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25557650275.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 51115300546 in words is "fifty-one billion, one hundred fifteen million, three hundred thousand, five hundred forty-six".