612378231 has 16 divisors (see below), whose sum is σ = 841730400. Its totient is φ = 395722368.

The previous prime is 612378223. The next prime is 612378257. The reversal of 612378231 is 132873216.

It is not a de Polignac number, because 612378231 - 2³ = 612378223 is a prime.

It is a super-2 number, since 2×612378231² = 750014195605378722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 612378192 and 612378201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612378281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19605 + ... + 40113.

It is an arithmetic number, because the mean of its divisors is an integer number (52608150).

Almost surely, 2^612378231 is an apocalyptic number.

612378231 is a deficient number, since it is larger than the sum of its proper divisors (229352169).

612378231 is a wasteful number, since it uses less digits than its factorization.

612378231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20818.

The product of its digits is 12096, while the sum is 33.

The square root of 612378231 is about 24746.2771139418. The cubic root of 612378231 is about 849.1933436004.

The spelling of 612378231 in words is "six hundred twelve million, three hundred seventy-eight thousand, two hundred thirty-one".