1215452051 has 16 divisors (see below), whose sum is σ = 1345712640. Its totient is φ = 1088549280.

The previous prime is 1215452039. The next prime is 1215452057. The reversal of 1215452051 is 1502545121.

It is a cyclic number.

It is not a de Polignac number, because 1215452051 - 2⁶ = 1215451987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215452051.

It is not an unprimeable number, because it can be changed into a prime (1215452057) 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, 474065 + ... + 476621.

It is an arithmetic number, because the mean of its divisors is an integer number (84107040).

Almost surely, 2^1215452051 is an apocalyptic number.

1215452051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1215452051 is a deficient number, since it is larger than the sum of its proper divisors (130260589).

1215452051 is a wasteful number, since it uses less digits than its factorization.

1215452051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1215452051 is about 34863.3339054084. Note that the first 3 decimals coincide. The cubic root of 1215452051 is about 1067.2003121541.

Adding to 1215452051 its reverse (1502545121), we get a palindrome (2717997172).

The spelling of 1215452051 in words is "one billion, two hundred fifteen million, four hundred fifty-two thousand, fifty-one".