1225215210 has 32 divisors (see below), whose sum is σ = 2980802880. Its totient is φ = 322247808.

The previous prime is 1225215193. The next prime is 1225215227. The reversal of 1225215210 is 125125221.

It is an interprime number because it is at equal distance from previous prime (1225215193) and next prime (1225215227).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277540 + ... + 281919.

It is an arithmetic number, because the mean of its divisors is an integer number (93150090).

Almost surely, 2^1225215210 is an apocalyptic number.

1225215210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225215210 is an abundant number, since it is smaller than the sum of its proper divisors (1755587670).

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

1225215210 is a wasteful number, since it uses less digits than its factorization.

1225215210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559542.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1225215210 is about 35003.0742935531. The cubic root of 1225215210 is about 1070.0501359453.

The spelling of 1225215210 in words is "one billion, two hundred twenty-five million, two hundred fifteen thousand, two hundred ten".