215714731401 has 27 divisors (see below), whose sum is σ = 337428298389. Its totient is φ = 132736380192.

The previous prime is 215714731387. The next prime is 215714731513. The reversal of 215714731401 is 104137417512.

The square root of 215714731401 is 464451.

It is a perfect power (a square), and thus also a powerful number.

215714731401 is a `hidden beast` number, since 2 + 1 + 571 + 4 + 73 + 14 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60302169225 + 155412562176 = 245565^2 + 394224^2 .

It is not a de Polignac number, because 215714731401 - 2¹¹ = 215714729353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215714730401) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18107635 + ... + 18119543.

Almost surely, 2^215714731401 is an apocalyptic number.

215714731401 is the 464451-st square number.

215714731401 is the 232226-th centered octagonal number.

It is an amenable number.

215714731401 is a deficient number, since it is larger than the sum of its proper divisors (121713566988).

215714731401 is an frugal number, since it uses more digits than its factorization.

215714731401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23850 (or 11925 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

Multiplying 215714731401 by its sum of digits (36), we get a square (7765730330436 = 2786706²).

The spelling of 215714731401 in words is "two hundred fifteen billion, seven hundred fourteen million, seven hundred thirty-one thousand, four hundred one".