1381523502 has 32 divisors (see below), whose sum is σ = 2788531200. Its totient is φ = 456274368.

The previous prime is 1381523477. The next prime is 1381523503. The reversal of 1381523502 is 2053251831.

It is a self number, because there is not a number n which added to its sum of digits gives 1381523502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381523503) 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, 504874 + ... + 507602.

It is an arithmetic number, because the mean of its divisors is an integer number (87141600).

Almost surely, 2^1381523502 is an apocalyptic number.

1381523502 is an abundant number, since it is smaller than the sum of its proper divisors (1407007698).

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

1381523502 is a wasteful number, since it uses less digits than its factorization.

1381523502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1381523502 is about 37168.8512332571. The cubic root of 1381523502 is about 1113.7458337555.

The spelling of 1381523502 in words is "one billion, three hundred eighty-one million, five hundred twenty-three thousand, five hundred two".