51481153 has 4 divisors (see below), whose sum is σ = 53719488. Its totient is φ = 49242820.

The previous prime is 51481147. The next prime is 51481159. The reversal of 51481153 is 35118415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35118415 = 5 ⋅7023683.

It is an interprime number because it is at equal distance from previous prime (51481147) and next prime (51481159).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51481153 is a prime.

It is a super-2 number, since 2×51481153² = 5300618228418818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51481159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1119133 + ... + 1119178.

It is an arithmetic number, because the mean of its divisors is an integer number (13429872).

Almost surely, 2^51481153 is an apocalyptic number.

It is an amenable number.

51481153 is a deficient number, since it is larger than the sum of its proper divisors (2238335).

51481153 is a wasteful number, since it uses less digits than its factorization.

51481153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238334.

The product of its digits is 2400, while the sum is 28.

The square root of 51481153 is about 7175.0367943307. The cubic root of 51481153 is about 372.0055521004.

Adding to 51481153 its reverse (35118415), we get a palindrome (86599568).

The spelling of 51481153 in words is "fifty-one million, four hundred eighty-one thousand, one hundred fifty-three".