102401331 has 4 divisors (see below), whose sum is σ = 136535112. Its totient is φ = 68267552.

The previous prime is 102401323. The next prime is 102401357. The reversal of 102401331 is 133104201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133104201 = 3 ⋅44368067.

It is a cyclic number.

It is not a de Polignac number, because 102401331 - 2³ = 102401323 is a prime.

It is a super-2 number, since 2×102401331² = 20972065181143122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102401331.

It is not an unprimeable number, because it can be changed into a prime (102406331) 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, 17066886 + ... + 17066891.

It is an arithmetic number, because the mean of its divisors is an integer number (34133778).

Almost surely, 2^102401331 is an apocalyptic number.

102401331 is a deficient number, since it is larger than the sum of its proper divisors (34133781).

102401331 is an equidigital number, since it uses as much as digits as its factorization.

102401331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34133780.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 102401331 is about 10119.3542778183. The cubic root of 102401331 is about 467.8448651197.

Adding to 102401331 its reverse (133104201), we get a palindrome (235505532).

The spelling of 102401331 in words is "one hundred two million, four hundred one thousand, three hundred thirty-one".