213920157 has 16 divisors (see below), whose sum is σ = 313434432. Its totient is φ = 128699520.

The previous prime is 213920123. The next prime is 213920167. The reversal of 213920157 is 751029312.

It is not a de Polignac number, because 213920157 - 2⁶ = 213920093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213920167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19138 + ... + 28179.

It is an arithmetic number, because the mean of its divisors is an integer number (19589652).

Almost surely, 2^213920157 is an apocalyptic number.

It is an amenable number.

213920157 is a deficient number, since it is larger than the sum of its proper divisors (99514275).

213920157 is a wasteful number, since it uses less digits than its factorization.

213920157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47468.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 213920157 is about 14626.0096061776. The cubic root of 213920157 is about 598.0680051146.

Adding to 213920157 its reverse (751029312), we get a palindrome (964949469).

The spelling of 213920157 in words is "two hundred thirteen million, nine hundred twenty thousand, one hundred fifty-seven".