1213315501 has 8 divisors (see below), whose sum is σ = 1245460608. Its totient is φ = 1181292000.

The previous prime is 1213315457. The next prime is 1213315511. The reversal of 1213315501 is 1055133121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213315501 - 2¹⁹ = 1212791213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213315511) 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, 10005 + ... + 50266.

It is an arithmetic number, because the mean of its divisors is an integer number (155682576).

Almost surely, 2^1213315501 is an apocalyptic number.

It is an amenable number.

1213315501 is a deficient number, since it is larger than the sum of its proper divisors (32145107).

1213315501 is an equidigital number, since it uses as much as digits as its factorization.

1213315501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60803.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1213315501 is about 34832.6786365907. The cubic root of 1213315501 is about 1066.5746288534.

Adding to 1213315501 its reverse (1055133121), we get a palindrome (2268448622).

The spelling of 1213315501 in words is "one billion, two hundred thirteen million, three hundred fifteen thousand, five hundred one".