1213050531 has 48 divisors (see below), whose sum is σ = 2037772800. Its totient is φ = 628298880.

The previous prime is 1213050529. The next prime is 1213050539. The reversal of 1213050531 is 1350503121.

It is not a de Polignac number, because 1213050531 - 2¹ = 1213050529 is a prime.

It is a super-2 number, since 2×1213050531² = 2942983181518763922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1213050498 and 1213050507.

It is not an unprimeable number, because it can be changed into a prime (1213050539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1445410 + ... + 1446248.

It is an arithmetic number, because the mean of its divisors is an integer number (42453600).

Almost surely, 2^1213050531 is an apocalyptic number.

1213050531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213050531 is a deficient number, since it is larger than the sum of its proper divisors (824722269).

1213050531 is a wasteful number, since it uses less digits than its factorization.

1213050531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1213050531 is about 34828.8749602970. The cubic root of 1213050531 is about 1066.4969818731.

Adding to 1213050531 its reverse (1350503121), we get a palindrome (2563553652).

The spelling of 1213050531 in words is "one billion, two hundred thirteen million, fifty thousand, five hundred thirty-one".