312122140 has 48 divisors (see below), whose sum is σ = 718230240. Its totient is φ = 112993280.

The previous prime is 312122119. The next prime is 312122143. The reversal of 312122140 is 41221213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312122143) 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, 48216 + ... + 54304.

It is an arithmetic number, because the mean of its divisors is an integer number (14963130).

Almost surely, 2^312122140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312122140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359115120).

312122140 is an abundant number, since it is smaller than the sum of its proper divisors (406108100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312122140 is a wasteful number, since it uses less digits than its factorization.

312122140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6342 (or 6340 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 312122140 is about 17666.9788022740. The cubic root of 312122140 is about 678.3307818779.

Adding to 312122140 its reverse (41221213), we get a palindrome (353343353).

The spelling of 312122140 in words is "three hundred twelve million, one hundred twenty-two thousand, one hundred forty".