2101191542 has 16 divisors (see below), whose sum is σ = 3293982720. Its totient is φ = 1003340712.

The previous prime is 2101191527. The next prime is 2101191553. The reversal of 2101191542 is 2451911012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5942 + ... + 65097.

It is an arithmetic number, because the mean of its divisors is an integer number (205873920).

Almost surely, 2^2101191542 is an apocalyptic number.

2101191542 is a deficient number, since it is larger than the sum of its proper divisors (1192791178).

2101191542 is a wasteful number, since it uses less digits than its factorization.

2101191542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71707.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 2101191542 is about 45838.7558949848. The cubic root of 2101191542 is about 1280.8213198062.

The spelling of 2101191542 in words is "two billion, one hundred one million, one hundred ninety-one thousand, five hundred forty-two".