155031402 has 16 divisors (see below), whose sum is σ = 310195872. Its totient is φ = 51654960.

The previous prime is 155031319. The next prime is 155031407. The reversal of 155031402 is 204130551.

It is not an unprimeable number, because it can be changed into a prime (155031407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16108 + ... + 23864.

It is an arithmetic number, because the mean of its divisors is an integer number (19387242).

Almost surely, 2^155031402 is an apocalyptic number.

155031402 is an abundant number, since it is smaller than the sum of its proper divisors (155164470).

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

155031402 is a wasteful number, since it uses less digits than its factorization.

155031402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11093.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 155031402 is about 12451.1606687891. The cubic root of 155031402 is about 537.2048086716.

Adding to 155031402 its reverse (204130551), we get a palindrome (359161953).

The spelling of 155031402 in words is "one hundred fifty-five million, thirty-one thousand, four hundred two".