45409951 has 4 divisors (see below), whose sum is σ = 45429592. Its totient is φ = 45390312.

The previous prime is 45409939. The next prime is 45409957. The reversal of 45409951 is 15990454.

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

It is a cyclic number.

It is not a de Polignac number, because 45409951 - 2⁹ = 45409439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45409951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45409957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5805 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (11357398).

Almost surely, 2^45409951 is an apocalyptic number.

45409951 is a deficient number, since it is larger than the sum of its proper divisors (19641).

45409951 is a wasteful number, since it uses less digits than its factorization.

45409951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19640.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 45409951 is about 6738.6905998124. The cubic root of 45409951 is about 356.7661795675.

It can be divided in two parts, 45409 and 951, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 45409951 in words is "forty-five million, four hundred nine thousand, nine hundred fifty-one".