45431402 has 4 divisors (see below), whose sum is σ = 68147106. Its totient is φ = 22715700.

The previous prime is 45431401. The next prime is 45431411. The reversal of 45431402 is 20413454.

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., 32478601 + 12952801 = 5699^2 + 3599^2 .

It is not an unprimeable number, because it can be changed into a prime (45431401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11357849 + ... + 11357852.

Almost surely, 2^45431402 is an apocalyptic number.

45431402 is a deficient number, since it is larger than the sum of its proper divisors (22715704).

45431402 is a wasteful number, since it uses less digits than its factorization.

45431402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715703.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 45431402 is about 6740.2820415766. The cubic root of 45431402 is about 356.8223477744.

Adding to 45431402 its reverse (20413454), we get a palindrome (65844856).

The spelling of 45431402 in words is "forty-five million, four hundred thirty-one thousand, four hundred two".