215734442 has 16 divisors (see below), whose sum is σ = 403451712. Its totient is φ = 84052320.

The previous prime is 215734373. The next prime is 215734447. The reversal of 215734442 is 244437512.

It is a junction number, because it is equal to n+sod(n) for n = 215734399 and 215734408.

It is not an unprimeable number, because it can be changed into a prime (215734447) 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, 700283 + ... + 700590.

It is an arithmetic number, because the mean of its divisors is an integer number (25215732).

Almost surely, 2^215734442 is an apocalyptic number.

215734442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

215734442 is a deficient number, since it is larger than the sum of its proper divisors (187717270).

215734442 is a wasteful number, since it uses less digits than its factorization.

215734442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400893.

The product of its digits is 26880, while the sum is 32.

The square root of 215734442 is about 14687.9012115414. The cubic root of 215734442 is about 599.7540121267.

The spelling of 215734442 in words is "two hundred fifteen million, seven hundred thirty-four thousand, four hundred forty-two".