1220115510 has 48 divisors (see below), whose sum is σ = 3186578304. Its totient is φ = 323899776.

The previous prime is 1220115499. The next prime is 1220115539. The reversal of 1220115510 is 155110221.

1220115510 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10327 + ... + 50466.

It is an arithmetic number, because the mean of its divisors is an integer number (66387048).

Almost surely, 2^1220115510 is an apocalyptic number.

1220115510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220115510 is an abundant number, since it is smaller than the sum of its proper divisors (1966462794).

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

1220115510 is a wasteful number, since it uses less digits than its factorization.

1220115510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61029 (or 61026 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1220115510 is about 34930.1518748488. The cubic root of 1220115510 is about 1068.5634519997.

Adding to 1220115510 its reverse (155110221), we get a palindrome (1375225731).

The spelling of 1220115510 in words is "one billion, two hundred twenty million, one hundred fifteen thousand, five hundred ten".