51146407 has 4 divisors (see below), whose sum is σ = 55080760. Its totient is φ = 47212056.

The previous prime is 51146369. The next prime is 51146413. The reversal of 51146407 is 70464115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70464115 = 5 ⋅14092823.

It is a cyclic number.

It is not a de Polignac number, because 51146407 - 2¹⁵ = 51113639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51146467) 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, 1967157 + ... + 1967182.

It is an arithmetic number, because the mean of its divisors is an integer number (13770190).

Almost surely, 2^51146407 is an apocalyptic number.

51146407 is a deficient number, since it is larger than the sum of its proper divisors (3934353).

51146407 is a wasteful number, since it uses less digits than its factorization.

51146407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934352.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 51146407 is about 7151.6716227746. The cubic root of 51146407 is about 371.1975006915.

The spelling of 51146407 in words is "fifty-one million, one hundred forty-six thousand, four hundred seven".