102531402 has 24 divisors (see below), whose sum is σ = 222583140. Its totient is φ = 34110720.

The previous prime is 102531397. The next prime is 102531409. The reversal of 102531402 is 204135201.

102531402 is a `hidden beast` number, since 10 + 253 + 1 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 101183481 + 1347921 = 10059^2 + 1161^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (102531409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4474 + ... + 15002.

Almost surely, 2^102531402 is an apocalyptic number.

102531402 is an abundant number, since it is smaller than the sum of its proper divisors (120051738).

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

102531402 is a wasteful number, since it uses less digits than its factorization.

102531402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078 (or 11075 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 102531402 is about 10125.7790811374. The cubic root of 102531402 is about 468.0428680873.

Adding to 102531402 its reverse (204135201), we get a palindrome (306666603).

The spelling of 102531402 in words is "one hundred two million, five hundred thirty-one thousand, four hundred two".