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30431042 = 215215521
BaseRepresentation
bin111010000010…
…1011101000010
32010021001112122
41310011131002
530242243132
63004124242
7516442145
oct164053502
963231478
1030431042
11161a5324
12a236682
1363c6245
14408205c
152a11912
hex1d05742

30431042 has 4 divisors (see below), whose sum is σ = 45646566. Its totient is φ = 15215520.

The previous prime is 30431021. The next prime is 30431059. The reversal of 30431042 is 24013403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 2563201 = 5279^2 + 1601^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30431042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607759 + ... + 7607762.

Almost surely, 230431042 is an apocalyptic number.

30431042 is a deficient number, since it is larger than the sum of its proper divisors (15215524).

30431042 is a wasteful number, since it uses less digits than its factorization.

30431042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15215523.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30431042 is about 5516.4338118027. The cubic root of 30431042 is about 312.2043437278.

Adding to 30431042 its reverse (24013403), we get a palindrome (54444445).

The spelling of 30431042 in words is "thirty million, four hundred thirty-one thousand, forty-two".

Divisors: 1 2 15215521 30431042