1958642215 has 4 divisors (see below), whose sum is σ = 2350370664. Its totient is φ = 1566913768.

The previous prime is 1958642209. The next prime is 1958642219. The reversal of 1958642215 is 5122468591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1958642215 - 2¹⁵ = 1958609447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958642219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195864217 + ... + 195864226.

It is an arithmetic number, because the mean of its divisors is an integer number (587592666).

Almost surely, 2^1958642215 is an apocalyptic number.

1958642215 is a deficient number, since it is larger than the sum of its proper divisors (391728449).

1958642215 is an equidigital number, since it uses as much as digits as its factorization.

1958642215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391728448.

The product of its digits is 172800, while the sum is 43.

The square root of 1958642215 is about 44256.5499672082. The cubic root of 1958642215 is about 1251.1758993284.

The spelling of 1958642215 in words is "one billion, nine hundred fifty-eight million, six hundred forty-two thousand, two hundred fifteen".