1213063156 has 24 divisors (see below), whose sum is σ = 2207600640. Its totient is φ = 582540000.

The previous prime is 1213063133. The next prime is 1213063183. The reversal of 1213063156 is 6513603121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5220 + ... + 49531.

It is an arithmetic number, because the mean of its divisors is an integer number (91983360).

Almost surely, 2^1213063156 is an apocalyptic number.

It is an amenable number.

1213063156 is a deficient number, since it is larger than the sum of its proper divisors (994537484).

1213063156 is a wasteful number, since it uses less digits than its factorization.

1213063156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54975 (or 54973 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1213063156 is about 34829.0562031187. The cubic root of 1213063156 is about 1066.5006817678.

Adding to 1213063156 its reverse (6513603121), we get a palindrome (7726666277).

The spelling of 1213063156 in words is "one billion, two hundred thirteen million, sixty-three thousand, one hundred fifty-six".