213977142 has 96 divisors (see below), whose sum is σ = 507199680. Its totient is φ = 65007360.

The previous prime is 213977131. The next prime is 213977177. The reversal of 213977142 is 241779312.

It is a junction number, because it is equal to n+sod(n) for n = 213977097 and 213977106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 934284 + ... + 934512.

It is an arithmetic number, because the mean of its divisors is an integer number (5283330).

Almost surely, 2^213977142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213977142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253599840).

213977142 is an abundant number, since it is smaller than the sum of its proper divisors (293222538).

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

213977142 is a wasteful number, since it uses less digits than its factorization.

213977142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 355 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 213977142 is about 14627.9575471082. The cubic root of 213977142 is about 598.1211057355.

The spelling of 213977142 in words is "two hundred thirteen million, nine hundred seventy-seven thousand, one hundred forty-two".