1213473056 has 48 divisors (see below), whose sum is σ = 2533088376. Its totient is φ = 570249216.

The previous prime is 1213473049. The next prime is 1213473059. The reversal of 1213473056 is 6503743121.

It can be written as a sum of positive squares in 4 ways, for example, as 534349456 + 679123600 = 23116^2 + 26060^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1213473059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606650 + ... + 608646.

Almost surely, 2^1213473056 is an apocalyptic number.

1213473056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213473056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266544188).

1213473056 is an abundant number, since it is smaller than the sum of its proper divisors (1319615320).

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

1213473056 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 1213473056 = (3116324075)₉.

1213473056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141 (or 3133 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 1213473056 is about 34834.9401607065. The cubic root of 1213473056 is about 1066.6207935133.

The spelling of 1213473056 in words is "one billion, two hundred thirteen million, four hundred seventy-three thousand, fifty-six".