63431145 has 12 divisors (see below), whose sum is σ = 109947396. Its totient is φ = 33829920.

The previous prime is 63431107. The next prime is 63431161. The reversal of 63431145 is 54113436.

It can be written as a sum of positive squares in 2 ways, for example, as 6594624 + 56836521 = 2568^2 + 7539^2 .

It is not a de Polignac number, because 63431145 - 2⁸ = 63430889 is a prime.

It is a super-2 number, since 2×63431145² = 8047020312022050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 704746 + ... + 704835.

It is an arithmetic number, because the mean of its divisors is an integer number (9162283).

Almost surely, 2^63431145 is an apocalyptic number.

It is an amenable number.

63431145 is a deficient number, since it is larger than the sum of its proper divisors (46516251).

63431145 is a wasteful number, since it uses less digits than its factorization.

63431145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409592 (or 1409589 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 63431145 is about 7964.3672065017. The cubic root of 63431145 is about 398.8113567334.

It can be divided in two parts, 63 and 431145, that multiplied together give a triangular number (27162135 = T₇₃₇₀).

The spelling of 63431145 in words is "sixty-three million, four hundred thirty-one thousand, one hundred forty-five".