51149403 has 12 divisors (see below), whose sum is σ = 75601240. Its totient is φ = 33306336.

The previous prime is 51149383. The next prime is 51149431. The reversal of 51149403 is 30494115.

It is not a de Polignac number, because 51149403 - 2⁶ = 51149339 is a prime.

It is a super-2 number, since 2×51149403² = 5232522854512818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51149443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65698 + ... + 66471.

Almost surely, 2^51149403 is an apocalyptic number.

51149403 is a deficient number, since it is larger than the sum of its proper divisors (24451837).

51149403 is a wasteful number, since it uses less digits than its factorization.

51149403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132218 (or 132215 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51149403 is about 7151.8810812261. The cubic root of 51149403 is about 371.2047484212.

The spelling of 51149403 in words is "fifty-one million, one hundred forty-nine thousand, four hundred three".