51398403 has 24 divisors (see below), whose sum is σ = 82298880. Its totient is φ = 28420560.

The previous prime is 51398387. The next prime is 51398419. The reversal of 51398403 is 30489315.

It is an interprime number because it is at equal distance from previous prime (51398387) and next prime (51398419).

It is not a de Polignac number, because 51398403 - 2⁴ = 51398387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51398423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1083 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (3429120).

Almost surely, 2^51398403 is an apocalyptic number.

51398403 is a deficient number, since it is larger than the sum of its proper divisors (30900477).

51398403 is a wasteful number, since it uses less digits than its factorization.

51398403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11327 (or 11320 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 51398403 is about 7169.2679542614. The cubic root of 51398403 is about 371.8061265761.

The spelling of 51398403 in words is "fifty-one million, three hundred ninety-eight thousand, four hundred three".