51421442215 has 32 divisors (see below), whose sum is σ = 73514552832. Its totient is φ = 34034448000.

The previous prime is 51421442203. The next prime is 51421442227. The reversal of 51421442215 is 51224412415.

It is an interprime number because it is at equal distance from previous prime (51421442203) and next prime (51421442227).

It is not a de Polignac number, because 51421442215 - 2¹³ = 51421434023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455701 + ... + 557230.

It is an arithmetic number, because the mean of its divisors is an integer number (2297329776).

Almost surely, 2^51421442215 is an apocalyptic number.

51421442215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51421442215 is a deficient number, since it is larger than the sum of its proper divisors (22093110617).

51421442215 is a wasteful number, since it uses less digits than its factorization.

51421442215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013031.

The product of its digits is 12800, while the sum is 31.

The spelling of 51421442215 in words is "fifty-one billion, four hundred twenty-one million, four hundred forty-two thousand, two hundred fifteen".